Person Page - 1940

     Philippe de Trie sn de Fontenay married Alienor (?) Dame de Fontenay.¹

     Catherine de Trie married Guillaume (?) sn de Caenton before 1219.¹

     Guillaume (?) sn de Caenton married Catherine de Trie, daughter of Jean I (?) de Trie et d’Aelis de Dammartin and Aelis (?) de Dammartin, before 1219.¹

     Robert IV Bertrand de Bricquebec was born before 1193.³ He married Jeanne Tesson dame de Thury et de Thruit, daughter of Raoul V Tesson seigneur de La Roche-Tesson, Tuit, T(h)ury et Fontenay-Le-Marmion, baron de Saint-Sauveur and Mathilde de la Lande-Patri, circa 1210.^3,4

Robert IV Bertrand de Bricquebec died between 22 July 1228 and September 1240.^4,3
      ; Per Med Lands:
     "ROBERT [IV] Bertrand (-[22 Jul 1228/Sep 1240]). "Robertus Bertran" granted property to "Herberti de Barnevilla, servienti meo" by charter dated 1195[808]. "Robertus Bertran" granted property to "Roberto Brienchon" by charter dated to before 1204, witnessed by "Willelmo Bertran, Roberto Bertran juniore filiis meis"[809]. "Robertus Bertran" confirmed the donations to the priory of Notre-Dame de Beaumont-en-Auge by "predecessorum meorum…Robertus Tortus et eius uxor Susanna" by charter dated 1221[810]. "Robertus Bertran miles" donated revenue to Bricquebec priory for the soul of "Ysabelis sororis mee, condam domine de Rocha" by charter dated 22 Jul 1228[811].
     "m JEANNE Taisson, daughter of RAOUL Taisson & his wife Mathilde de La Lande-Patri (-1262 or after). A document dated 27 Jul 1381 in litigation in the Paris parliament records that the second of the three daughters of "Raoul Tesson sire de la Roche Tesson, de Tuit, Tury, Fontenay le Marmion" was married "a messire Robert Bertran" to whom she brought "les terres de Tuit, Tury et Fontenay le Marmion"[812]. She obtained the fief of Thury under the inheritance of her father[813]. "Philippus Marmion" sold Fontenay le Marmion, previously held by "Roberti Marmion patris mei, et Willelmi Marmion patrui mei" to "domine Johanne de Tureio" by charter dated 2 Nov 1245[814].
     "Robert [IV] & his wife had three children."
Med Lands cites:

; Per Racines et Histoire: "Robert IV Bertran de Bricquebec ° avant 1193 + après 22/07/1228 & avant 09/1240 rallié à Philippe II Auguste ~1204, chevalier banneret (1208), seigneur de Honfleur, vicomte de Roncheville, Connétable de Normandie (1236), seigneur de Thury et du Thuit (par sa femme), beau-frère de Robert II de Thibouvile (donations par charte 1195 à son vassal Herbert de Barneville ; avant 1204 à Robert de Brienchon, avec ses fils Guillaume et Robert ; confirme les donations de ses prédécesseurs ; don de rente au Prieuré de Bricquebec pour le repos de l’âme de sa soeur Isabelle par charte 22/07/1228) ép. ~1210 Jeanne Taisson (alias Tesson) dame de Tuit, T(h)ury et FontenayLe-Marmion + 1262 ou peu après (fille cadette de Raoul V, seigneur de La RocheTesson, Tuit, T(h)ury et Fontenay-Le-Marmion, baron de Saint-Sauveur, et de Mathilde de La Lande-Patri.)³"

     Yves IV de Beaumont comte de Beaumont, seigneur de Conflans married Emma (?)^2,1
Yves IV de Beaumont comte de Beaumont, seigneur de Conflans was born circa 1015.¹
Yves IV de Beaumont comte de Beaumont, seigneur de Conflans died on 22 May 1059.¹
Yves IV de Beaumont comte de Beaumont, seigneur de Conflans died on 22 May 1059.²
     GAV-27. Yves IV de Beaumont comte de Beaumont, seigneur de Conflans was also known as Ivo II Cte de Beaumont-sur-Oise, sn de Conflans.²

     Emma (?) married Yves IV de Beaumont comte de Beaumont, seigneur de Conflans, son of Yves III de Beaumont comte de Beaumont.^1,2
Emma (?) was born circa 1020.²
     GAV-27. Emma (?) was also known as Emma/Emme (?)²

     Josfredus (?) Cte de Beaumont died between 1068 and 1070.¹

     Aubri de Beaumont Vicomte de Coucy married Ada de Marle Vicomtesse de Coucy, daughter of Lietaud de Roucy Seigneur of Marle and Mathilde/Mahaut (?), before 1059.^2,1
Aubri de Beaumont Vicomte de Coucy and Ada de Marle Vicomtesse de Coucy were divorced in 1059.¹
Aubri de Beaumont Vicomte de Coucy died before 1095.¹
     Aubri de Beaumont Vicomte de Coucy was also known as Aubri Vcte de Coucy.²

     Renaud (?) de Louvain was born circa 1018.^1,2
Renaud (?) de Louvain died circa 1096.^1,2

     Yves V de Beaumont comte de Beaumont married Judith (?)
; his 1st wife, per Racines et Histoire "citée par Orderic Vital."^2,3 Yves V de Beaumont comte de Beaumont married Adélaïde de Gournay, daughter of Hugues "Le Vieux" de Gournay and Basilie de Dammartin,
; his 2nd wife.^3,2 Yves V de Beaumont comte de Beaumont was born circa 1040 at Beaumont-Sur-Oise, Normandy, France.²
Yves V de Beaumont comte de Beaumont died after 1083.³
Yves V de Beaumont comte de Beaumont died after 1083.²
     GAV-26.

; per Racines et Histoire: "témoin de chartes : 1042/44 - trésorier de Saint-Martin, 1071 - Bouchard de Corbeil en faveur de Saint-Spire de Corbeil ; fonde Conflans-Sainte-Honorine 1080.²" Yves V de Beaumont comte de Beaumont was also known as Ivo III Cte de Beaumont.³

     Conon de Montaigu comte de Montaigu married Ide (?) de Boulogne, daughter of Eustache II «Aux Grenons» (?) Comte de Boulogne et de Lens and Ida de Lorraine,
;
His 2nd wife; Her 2nd husband.^2,3
     ; Per Med Lands:
     "[IDA . Europäische Stammtafeln[783] shows Ida, wife [firstly] of Hermann [von Malsen] and [secondly of Conon de Montaigu], as a possible daughter of Comte Eustache II & his wife Ida. The only partial corroboration for this so far found is Orderic Vitalis who says that "Cono comes Alemannus" married "Duke Godfrey's sister"[784].
     "m firstly ([1070]) HERMANN [von Malsen], son of --- (-1080 or after).
     "m secondly as his second wife, CONON Comte de Montaigu, son of GOZELO Comte de Montaigu & his wife Ermentrude de Grandpré (-30 Apr 1106).] "
Med Lands cites: EDV-28.

     Beatrix de Clermont was born between 1080 and 1085.² She married Mathieu I de Beaumont Cte de Beaumont, son of Yves V de Beaumont comte de Beaumont and Adélaïde de Gournay, before 1101.^1,2

Beatrix de Clermont died circa 1110.²

     Mathieu I de Beaumont Cte de Beaumont was born circa 1080.² He married Beatrix de Clermont, daughter of Hugues II de Creil dit «de Mouchy» (?) Seigneur de Mouchy, Comte de Clermont-en-Beauvaisis and Marguerite de Montdidier of Roucy, before 1101.^1,2

Mathieu I de Beaumont Cte de Beaumont died on 1 January 1155; per Racines et Histoire: "1151 selon Depoin."^1,2
     He was Chambrier de France in 1135.²

     Gosbert de Beaumont was living in 1039.²

     Hugues de Beaumont married Agnes (?) de Croisilles, daughter of Alard (?) de Croisilles and Havide (?).^1,2

     Adèle de Beaumont married Guillaume de Senlis, son of Galeran "Blanchard" de Senlis and Héloïse de Pithiviers.^1,2

     Joan de Mountsorell married John de Bridport.^1,3
Joan de Mountsorell was born at White Lackington, co. Somerset, England.¹
      ; Leo van de Pas cites: The Ancestry of Elizabeth of York 1999. , Marlyn Lewis, Reference: 111.¹

     Mathieu II de Beaumont-sur-Oise comte de Beaumont-sur-Oise was born circa 1110.² He married Mathilde (?) de Châteaudun, daughter of Geoffroi III/IV (?) vicomte de Châteaudun, Seigneur de Mondoubleau and Heloise/Hawise/Havoise/Havise (?) Dame de Mondoubleau, before 1154
; his 1st wife.^1,2,3 Mathieu II de Beaumont-sur-Oise comte de Beaumont-sur-Oise married Adele/Alix (?) dame de Luzarches, (douaire) dame de La Queue-en-Brie after 1158
; his 2nd wife.^1,2
Mathieu II de Beaumont-sur-Oise comte de Beaumont-sur-Oise died between 1 July 1174 and 1175.^2,3
     He was Chambrier de France between 1151 and 1175.²

     Mathilde (?) de Châteaudun was born circa 1125.² She married Mathieu II de Beaumont-sur-Oise comte de Beaumont-sur-Oise, son of Mathieu I de Beaumont Cte de Beaumont and Beatrix de Clermont, before 1154
; his 1st wife.^1,2,3
Mathilde (?) de Châteaudun died on 26 June 1158.^1,2,3

     Heinrich Hugo XII von Dagsburg Graf von Dagsburg was born in 1138.¹ He married Luitgarde/Luitgardis (?) von Moha & Sultzbach, daughter of Berengar I von Sulzbach Graf von Sulzbach, Graf von Bamberg and Adelheid von Diessen, in 1143
; her 2nd husband.^2,1
Heinrich Hugo XII von Dagsburg Graf von Dagsburg died in 1178.^2,1
     ; Per Racines et Histoire (1) Godefroi II de Louvain dit «Le Valeureux» ou «Le Jeune» (Godefroi VI, duc de Basse-Lorraine) + entre 11/11 et 31/12/1142 (13/06 ?) duc de BasseLorraine (1140, investi par Konrad III, Roi de Germanie, beau-frère de sa femme), duc de Louvain (1141) (donation de terres de Dudinsart à Gembloux 1131)
ép. 1139 Luitgard von Sulzbach ° ~1109 + après 1163 (1172 ?) (fille de Berangar 1er, graf von Sulzbach et d’Adelheid von Wolfratshausen-Diessen ;
ép. 2) 1143 Heinrich Hugo X, graf von Dabo (57) Dagsburg und Metz + 1178) ): “”.³
; Per Genealogy.EU (Babanbergs): “F4. Luitgardis, *ca 1109, +1162/63, bur Leuyen (Bel); 1m: ca 1139 Godfried II of Lower Lorraine (+13.6.1142); 2m: ca 1143 Hugo Heinrich von Dagsburg (+ca 1178)”.⁴
; Per Med Lands:
     "LUTGARDIS (-after 1162). The Genealogia Ducum Brabantiæ Heredum Franciæ names "Ludgarde ducissa de Saltzebach" as the wife of "Godefridus…secundus dux"[1907]. Her second marriage is suggested by the undated charter under which her son "Adelbertus…comes Metensis et de Dasbourch" appointed "nepotem meum ducem Lotharingiæ" as his heir "de castro meo Dasbourgh…"[1908].
     "m firstly ([1139]) GODEFROI VI Duke of Lower Lotharingia, son of GODEFROI V "le Barbu" Duke of Lower Lotharingia & his first wife Ida de Chiny (-1142).
     "m secondly (1143) HUGO [XII] Graf von Dachsburg und Metz, son of HUGO [XI] Graf von Dachsburg & his wife Gertrud [van Looz] (-1178 or after)."
Med Lands cites: Heinrich Hugo XII von Dagsburg Graf von Dagsburg was also known as Heinrich Hugo graf von Dabo, Dagsburg und Metz.²

; Per Med Lands:
     "[HEINRICH] HUGO [XII] (-1178 or after). 1138/1178. Graf von Dagsburg: "Hugo comes de Dagsburc" donated the church of Antheit "in allodio meo de Musac" to Flône abbey by charter dated 1146[310]. “...Comes Hugo de Dagesburc, comes Sigebertus..” witnessed the 25 Jan 1156 charter under which Emperor Friedrich I confirmed fiscal exemptions to the men of Strasbourg St Thomas and St Peter[311]. “Comes Hugo de Dagesburc” reached agreement with "abbas Novillarensis ecclesiæ" relating to land "Warthenbergensi castro adjacentia" by charter dated 1158[312]. The Annales Argentinenses record that "comite Hugone de Dagesburg" destroyed Horburg in 1162[313].
     "m (1143) as her second husband, LUTGARDIS von Sulzbach, widow of GODEFROI VI Duke of Lower Lotharingia, daughter of BERENGAR [III] Graf von Sulzbach & his second wife Adelheid von Wolfratshausen (-after 1163). The Genealogia Ducum Brabantiæ Heredum Franciæ names "Ludgarde ducissa de Saltzebach" as the wife of "Godefridus…secundus dux"[314]. Her second marriage is suggested by the undated charter under which her son "Adelbertus…comes Metensis et de Dasbourch" appointed "nepotem meum ducem Lotharingiæ" as his heir "de castro meo Dasbourgh…"[315]."
Med Lands cites:

     Hugues I de Beaumont Vcte de Beaumont, sn de Persan married Béatrix (?)
; his 1st wife.²

     Mathieu III de Beaumont Cte de Beaumont-sur-Oise et comte de Valois was born between 1145 and 1155.⁶ He married Eleonore (?) Comtesse de Vermandois, Comtesse de Saint-Quentin, Dame de Valois, daughter of Raoul I "le Vaillant" de Vermandois Cmte de Vermandois et de Valois, seneschal of France and Laurette (?) of Flanders, circa 1175
;
His 1st wife; her 4th husband.^{1,2,7,8,4,5,3} Mathieu III de Beaumont Cte de Beaumont-sur-Oise et comte de Valois and Eleonore (?) Comtesse de Vermandois, Comtesse de Saint-Quentin, Dame de Valois were divorced in 1192.^1,5,3 Mathieu III de Beaumont Cte de Beaumont-sur-Oise et comte de Valois married Eleonore/Alienor de Soissons, daughter of Raoul I de Nesle (?) Comte de Soissons, Chatelain de Noyon and Adèle/Alix de Dreux Dame de Montjay, before 1199
;
His 2nd wife; her 1st husband.^{1,4,5,3,9,10,11}
Mathieu III de Beaumont Cte de Beaumont-sur-Oise et comte de Valois died between 21 November 1208 and 24 November 1208; Genealogics says d. ca 21 Nov 1208-24 Nov 1208.^1,6,4,5
     ; Per Med Lands:
     "ELEONORE de Vermandois ([1148/49]-[19/21] Jun 1213, bur Abbaye de Longpont). The De Genere Comitum Flandrensium, Notæ Parisienses names "Elisabeth comitisse Flandrie et Lyenordis comitisse Viromandensis" as children of "Radulfus [filius comitis Hugonis li Maines]"[364]. The Chronicon Hanoniense names "Aenoram Radulphi comitis Viromandie filiam" as wife of "Godefridum [filium Alidis comitissa Hanonensis…cum viro Balduino comite]", and in a later passage refers to her subsequent marriages to "Willelmo comiti Nivernensi…[et] Matheo comiti Boloniensi…[et] comiti Bellimontis in Francia Matheo"[365]. Robert of Torigny records the marriage in 1170 of "uxorem eius [=Willermo comite Nivernensi] sororem…comitissæ Flandrensis" and "Mathæus frater Philippi comitis Flandrensium comes Boloniæ"[366]. She claimed the succession to Vermandois on the death of her sister in 1183. "Elienor…comitissa Bellomontis et heres Viromandie" donated property to the abbey of Notre-Dame d'Ourscamp for the soul of "[comitis Philippi Flandrensis] uxoris sue sororis mee Elyzabeth…et Mathei comitis Bellomontis mariti mei, Henricique iunioris regis Anglie consanguinei mei et maritorum quis prius habui" by charter dated 1184[367]. Under the Treaty of Amiens, agreed with Philippe II King of France 20 Mar 1186, Eléonore retained Valois and part of Vermandois, calling herself from that time Ctss de Valois. "Elyenor…comitissa Bellomontis et…comitis Perone Radulfi filie" donated property to the abbey of Notre-Dame d'Ourscamp by charter dated 1189[368]. Following the death of her brother-in-law Philippe Count of Flanders, a final settlement was agreed with the king who was to inherit all her territories if she died without issue and from 1192 she succeeded as Ctss de Vermandois[369]. In accordance with the agreement of 1192, the king of France inherited all her titles and properties on her death. The necrology of the abbey of Saint-Denis records the death "XII Kal Jul" of "Alienordis comitissa Crespeiensis"[370].
     "m firstly (1162) GODEFROI de Hainaut Comte d’Ostrevant, son of BAUDOUIN IV “le Bâtisseur” Comte de Hainaut & his wife Alice de Namur (1147-Mons 7 Apr 1163, bur église Sainte-Waudru).
     "m secondly (1164) GUILLAUME [V] Comte de Nevers et d'Auxerre, son of GUILLAUME [IV] Comte de Nevers et d'Auxerre & his wife Ida von Sponheim [Carinthia] ([1145]-Acre 24 Oct 1168, bur Bethlehem).
     "m thirdly (1171) as his second wife, MATHIEU de Flandre, Comte de Boulogne, son of THIERRY I Count of Flanders & his second wife Sibylle d'Anjou ([1137]-killed in battle Driencourt 25 Dec 1173, bur Abbaye de Saint-Josse).
     "m fourthly (1175) as his first wife, MATHIEU [III] Comte de Beaumont-sur-Oise, son of MATHIEU [II] Comte de Beaumont-sur-Oise & his first wife Mathilde de Châteaudun (-21 or 24 Nov 1208, bur Priory of Lay)."
Med Lands cites:
; Per Genealogy.EU (Capet 8): “B4. [3m.] Cts Eleonore de Vermandois et de Valois, renounced her titles in 1214 in favor of the crown and became a nun, *1152, +after 1222; 1m: (probably) Godfrey of Hainaut, Ct of Ostervant (+1163); 2m: before 1167 Cte Guillaume IV de Nevers (+1168); 3m: ca 1170 Matthias of Lorraine, Cte de Boulogne (*ca 1137 +25.7.1173); 4m: ca 1175 Cte Mathieu III de Beaumont-sur-Oise (+1208/09); 5m: ca 1210 Etienne II de Blois, sn de Chatillon-sur-Loing (+1252)”.¹²
; Per Racines et Histoire (Vermandois et Valois): “2) Eléonore de Vermandois ° 11/1152 (posthume ?) + après 1222 comtesse de Valois (~1182) et de Vermandois (1191), résigne ses titres (1214) en faveur de la couronne de France et se fait nonne
ép. 1) 1162 Godefroi de Hainaut, comte d’Ostrevant ° 1147 + 07/04/1163 (fils de Baudouin IV, comte de Hainaut, et d’Adélaïde (Alix) de Namur)
ép. 2) avant 1167 Guillaume IV, comte de Nevers ° ~1145 + 24/10/1168 (croisé, Saint-Jean-d’Acre) (fils de Guillaume III de Nevers, comte d’Auxerre, et d’Ida de Carinthie)
ép. 3) ~1170 Mathieu de Lorraine dit «d’Alsace», °~1129/37 + 25/07/1173 comte de Boulogne (1160) (fils de Thierri d’Alsace, comte de Flandres, et de Sybille d’Anjou)
ép. 4) ~1175 Matthieu III, comte de Beaumont-sur-Oise + 27/11/1209
ép. 5) 1189 Hugues, baron d’Auxy ° ~1170 (fils d’Hugues, baron d’Auxy, et de Marguerite d’Aubigny)
ép. 6) ~1210 Etienne II de Blois (Sancerre), seigneur de Châtillon-sur-Loing + 1252”
Notes: No other source mentions either marriage #5 or #6.¹³

; Per Genealogy.EU (Beaumont 1): “D2. [1m.] Cte Mathieu III de Beaumont, +4.11.1208; 1m: (div 1192) Cts Eleonore de Vermandois et de Valois (*1152 +after 1222); 2m: before 1199 Alienor, dau.of Cte Raoul I de Soissons”.¹⁴

; Per Med Lands:
     "MATHIEU [III] de Beaumont (-21 or 24 Nov 1208, bur Priory of Lay). “Matheus comes Bellimontis” donated property to the monks of Saint-Léonor, with the consent of “Mathei filii sui primogeniti, ceterorumque filiorum eius, Philippi, Mathei atque Johannis” and the support of “Aelide comitissa”, by charter dated 1160[128]. “Matheus comes Bellimontis” granted exemption from passage duties through his county to Lannoy abbey, with the consent of “Aelidi comitissa uxore mea filiis quoque meis Matheo et Philippo”, by charter dated 1166[129]. “Mathei comitis, Mathei majoris et Mathei junioris et Philippi filiorum eius, Hugonis fratris eiusdem, Aelidis comitisse...” witnessed the charter dated [25 Mar 1170/25 Mar 1171] which records that “Ancoult d’Hénonville ecommunié” restored “la dîme de Nointel” to the monks of Nointel[130]. He succeeded his father as Comte de Beaumont. "Matheus comes Bellimontis et dominus Valesie" donated property to the abbey of Saint-Martin de Pontoise with the consent of "Elienoris comitisse uxoris sue filie Radulphi comitis Perone" for the souls of "Aelidis sororis mee et…fratrum suorum Philepi, Mathei, Johannis" by charter dated 1176[131]. "Matheus comes Bellimontibus" donated property to the abbey of Saint-Martin de Pontoise with the consent of "Helienor comitissa uxor mea et Philippo fratre meo" by charter dated 1177[132]. Chambrier de France 1180/1208[133]. "Matheus comes Bellimontes" exchanged property with the abbey of Saint-Martin de Pontoise with the consent of "uxoris mee Elienor filie comitis Suessionensis" by charter dated 1199[134]. The Chronicon Beccensis Abbatiæ records that "Mathæus comes Belli montis supra Isaram et Alienor uxor eius" founded “ecclesiam sanctæ Marie de Layo” in 1199[135]. "Matheus comes Bellimontis" donated property to Saint-Léonor with the consent of "uxore mea Eliennor et Johanne fratre meo" by charter dated 1 Jan/18 Apr 1199 or 1 Jan/9 Apr 1200[136]. The Necrologium Bellimontense records the death “VIII Kal Dec” of “Matheus comes tertius Bellimontis”[137].
     "m firstly (1175, divorced 1192) as her fourth husband, ELEONORE de Vermandois, widow firstly of GODEFROI de Hainaut Comte d’Ostrevant, secondly of GUILLAUME [V] Comte de Nevers et d'Auxerre, and thirdly of MATHIEU de Flandre Comte de Boulogne, daughter of RAOUL I “le Vaillant” Comte de Vermandois et de Valois & his second wife Aélis [Petronille] d'Aquitaine ([1148/49]-[19/21] Jun 1213, bur Abbaye de Longpont). The Chronicon Hanoniense names "Aenoram Radulphi comitis Viromandie filiam" as wife of "Godefridum [filium Alidis comitissa Hanonensis…cum viro Balduino comite]", and in a later passage refers to her subsequent marriages to "Willelmo comiti Nivernensi…[et] Matheo comiti Boloniensi…[et] comiti Bellimontis in Francia Matheo"[138]. "Matheus comes Bellimontis et dominus Valesie" donated property to the abbey of Saint-Martin de Pontoise with the consent of "Elienoris comitisse uxoris sue filie Radulphi comitis Perone" for the souls of "Aelidis sororis mee et…fratrum suorum Philepi, Mathei, Johannis" by charter dated 1176[139]. "Matheus comes Bellimontibus" donated property to the abbey of Saint-Martin de Pontoise with the consent of "Helienor comitissa uxor mea et Philippo fratre meo" by charter dated 1177[140]. She claimed the succession to Vermandois on the death of her sister in 1183, and succeeded in 1186 as Ctss de Valois. She succeeded as ELEONORE Ctss de Vermandois in 1192.
     "m secondly (before 1199) as her first husband, ELEONORE de Soissons, daughter of RAOUL [I] Comte de Soissons & his first wife Alix de Dreux [Capet] (-[May 1229/1234]). The Chronicle of Alberic de Trois-Fontaines names "uxorem comitis Iohannis Bellimontis…et uxorem Stephani de Sancerra" as the daughters of "Alaydis [filia comitem de Brana Robertum domnum]" & her fourth husband[141], although this appears to refer to the same person. "Matheus comes Bellimontes" exchanged property with the abbey of Saint-Martin de Pontoise with the consent of "uxoris mee Elienor filie comitis Suessionensis" by charter dated 1199[142]. The Chronicon Beccensis Abbatiæ records that "Mathæus comes Belli montis supra Isaram et Alienor uxor eius" founded “ecclesiam sanctæ Marie de Layo” in 1199[143]. "Matheus comes Bellimontis" donated property to Saint-Léonor with the consent of "uxore mea Eliennor et Johanne fratre meo" by charter dated 1 Jan/18 Apr 1199 or 1 Jan/9 Apr 1200[144]. She married secondly ([1209/14]) as his first wife, Etienne [II] de Sancerre Seigneur de Saint-Brisson. “Stephanus de Sacro-Cesare et Alienor uxor mea quondam comitissa Bellimontis” donated property to the prieuré du Lay by charter dated 1216[145]. "Stephanus de Sacrocesaris et Elianor uxor mea, Bellimontis quondam comitissa" donated property "in territorio Joiaci" to Val-Notre-Dame by charter dated Oct 1220[146]."
Med Lands cites:

; Per Racines et Histoire (Beaumont-sur-Oise): “1) Mathieu III de Beaumont ° ~1145/55 + 21 ou 24/11/1208 (ou 04/11/1208 ? ou 27/11/1209 ?, inh. au Prieuré de Lay) comte de Beaumont (1174) et de Valois (1182), Chambrier de France (1180/1208) (cité chartes : Saint-Léonor entre 01/01 et 09/04/1189 ou 25/03/1190, entre 01/01 et 18/04/1999 et 01/01 ou 09/04/1200 ; Saint-Martin de Pontoise 1176, 1177, 1199)
     ép. 1) ~1175 (div. 1192) Eléonore de Vermandois ° 1148/49/52 + 19 ou 21/06/1213 (ou 1221 ?) comtesse de Valois et de Saint-Quentin (1186) et de Vermandois (1192) (fille de Raoul 1er «Le Vaillant», comte de Vermandois & de Valois, et d’Aelis (Péronelle) d’Aquitaine ; veuve de 1) Godefroi de Hainaut, comte d’Ostrevant ; de 2) Guillaume V, comte de Nevers et d’Auxerre ; et de 3) Mathieu de Flandres, comte de Boulogne )
     ép. 2) avant 1199 Eléonore (Aliénor) de Soissons + en 05 entre 1229 et 1234 (fille de Raoul 1er, comte de Soissons, et d’Alix de Dreux ; ép. 2) après 1209 & avant 1214 Etienne II de Sancerre, seigneur de Saint-Brisson et de Châtillon-sur-Loing + 1252)
     sans postérité”.³

; Per Racines et Histoire (Soissons): “1) Eléonore (Aenor) de Nesle ° ~1190 + ~1229/34 (citée dans des chartes en 1199 à Saint-Martin de Pontoise et à Saint-Léonor 01/01-18/04/1199 ou 1200)
     ép. 1) avant 1199 Mathieu III, comte de Beaumont-sur-Oise + 21 ou 24/11/1208 (fils de Mathieu II et de Mathilde de Châteaudun)
     ép. 2) avant 1214 Etienne II de Sancerre, seigneur de Châtillon-sur-Loing + 1252 :
     postérité Sancerre & Melun”.¹¹

; Per Med Lands:
     "ELEONORE de Nesle (-[1229/34]). The Chronicle of Alberic de Trois-Fontaines names "uxorem comitis Iohannis Bellimontis…et uxorem Stephani de Sancerra" as the daughters of "Alaydis [filia comitem de Brana Robertum domnum]" & her fourth husband[794], although this appears to refer to the same person. "Matheus comes Bellimontes" exchanged property with the abbey of Saint-Martin de Pontoise with the consent of "uxoris mee Elienor filie comitis Suessionensis" by charter dated 1199[795]. The Chronicon Beccensis Abbatiæ records that "Mathæus comes Belli montis supra Isaram et Alienor uxor eius" founded “ecclesiam sanctæ Marie de Layo” in 1199[796]. "Matheus comes Bellimontis" donated property to Saint-Léonor with the consent of "uxore mea Eliennor et Johanne fratre meo" by charter dated 1 Jan/18 Apr 1199 or 1 Jan/9 Apr 1200[797]. "Stephanus de Sacrocesaris et Elianor uxor mea, Bellimontis quondam comitissa" donated property "in territorio Joiaci" to Val-Notre-Dame by charter dated Oct 1220[798].
     "m firstly (before 1199) as his second wife, MATHIEU [III] Comte de Beaumont-sur-Oise, son of MATHIEU [II] Comte de Beaumont & his first wife Mathilde de Châteaudun (-21 or 24 Nov 1208, bur Priory of Lay).
     "m secondly (before 1214) as his first wife, ETIENNE [II] de Sancerre Seigneur de Saint-Brisson, son of ETIENNE [I] de Blois Comte de Sancerre & his wife Alix [Mathilde] de Donzy (-1252)."
Med Lands cites: He was Chambrier de France between 1180 and 1208.⁶