| Event Type | Date | Place | Individual | Documents |
| Marriage | after November 1246 | ? | de COUCY Raoul with de DAMMARTIN Philippa |
| Death | 1246 | ? | de MAYENNE Jeanne |
| Death | about 1246 | ? | de VILLEHARDOUIN Guillaume 1er (30850562, 61797658) |
| Marriage | 1246 | ? | de DAMPIERRE Guy (123397352) with de BÉTHUNE Mathilde (123397353) |
| Death | 1246 | ? | d'ANGOULÊME Isabelle (123402563, 246805219) |
| Birth | about 12 ? 1247 | Montpellier Hérault France | d'ARAGON Isabelle (25905573, 25905581) |
| Marriage | 1247 | ? | de COURTENAY Raoul with de MONTFORT l'AMAURY Alix |
| Birth | about 1247 | ? | de VILLEBÉON de BAGNEUX Isabelle La Chambellane (15425283) |
| Death | 1247 | ? | de NAMUR Ermesinde (51811157, 493589165) |
| Birth | about 1247 | ? | de DAMPIERRE Robert III De Béthune (61698676) |
| Birth | about 1247 | ? | du MERLE Foucault 1er Foulques (3855760, 247190954) |
| Birth | 1247 | ? | de BOURGOGNE Yolande (61698677) |
| Death | 2 October 1248 | ? | de BOURGOGNE Béatrix (123339407, 493589139) |
| Birth | 1248 | Paris Paris France | de BOURGOGNE Robert II (12964366, 123397370) |
| Death | 1248 | ? | de LUSIGNAN Geoffroy II (493589130) |
| Death | 1248 | ? | de BÉTHUNE Robert VII (246794706) |
| Birth | about 1248 | ? | de PICQUIGNY Jean 1er (15425286) |
| Death | 1248 | ? | de DREUX Jean 1er (123397348, 246794684) |
| Death | 1248 | ? | de CHÂTILLON Hugues V (30850560, 493589176) |
| Death | 1248 | , , , , , À la croisade | de MELLO Guillaume 1er Le Jeune Le Pacifique (61701126, 123595318) |
| Birth | about 1248 | ? | d'ARTOIS Blanche (25905575, 52341787) |
| Death | 15 November 1249 | Cyprus - Nicosie | des BARRES Guillaume III |
| Death | 1249 | ? | de MELLO Dreux V |
| Death | 1249 | ? | de LUSIGNAN Hugues X (123402562, 246805218) |
| Death | 1249 | ? | de RANÇON Aimable (123397263, 123397335) |
| Death | 1249 | ? | de VENDÔME Pierre |
| Death | 1249 | ? | de HOUDETOT Mathilde (30845319, 61797709) |
| Death | 1249 | ? | de MONTFORT Jean 1er (123397350, 246794686) |
| Death | 1249 | ? | de BOURBON Archambaud VIII Le Grand Ou Archambaud IX Le Jeune (325541462, 987178316) |
| Death | 1249 | ? | de BOURBON Archambaud IX (246794710, 493589158) |
| Death | 8 February 1250 | ? | de MONTMORENCY Mathieu |
| Death | 8 February 1250 | Mansourah | d'ARTOIS Robert 1er (51811150, 104683560) |
| Death | 9 February 1250 | ? | de LUSIGNAN Raoul II |
| Death | 22 June 1250 | En Mer, , , , , Au large de Damiette | de DREUX Pierre 1er Mauclerc (103714904, 123397252) |
| Death | September 1250 | ? | de PONTHIEU Marie (51811143, 987178275) |
| Death | 1250 | ? | de CHAMPAGNE Philippa (123353651, 123595315) |
| Death | 1250 | ? | de CHATEAUDUN Geoffroi VI (246794702, 493589374) |
| Death | about 1250 | ? | du BREUIL de COURCELLES Amaury Morin (162770946) |
| Birth | about 1250 | ? | de CAILLAN Mabilla (40692755) |
| Birth | about 1250 | ? | de FAYDIT de TERSSAC Hélie (10173072, 40692624) |
| Birth | about 1250 | ? | de GREYSOLLES Isabelle (10173067, 40692619) |
| Birth | about 1250 | ? | RICARD Guillaume II (40938512, 40938576) |
| Death | 1250 | ? | de VARENNES Étienne (40249372) |
| Birth | about 1250 | ? | de VILLENEUVE Pons Albert (40692752) |
| Death | 1250 | ? | MAUVOISIN de CHEVRIÈRES Hugues (20124680) |
| Birth | 1250 | ? | de COURTENAY Amicie (25928725, 52341781) |
| Death | 1250 | ? | de VITRÉ André III (123397254, 123402554) |
| Birth | about 1250 | ? | de ROSTAING Adalasie (40692753) |
| Birth | 1250 | ? | de ROYE Mathieu (15425284) |
| Birth | about 1250 | ? | de SIGNE Guilhem (40692754) |
| Death | 1250 | ? | de CRAON Maurice IV (123402560, 246805216) |
| Death | 1250 | ? | de MONTAGNY Guy (20124736) |
| Birth | about 1250 | ? | de CHATEAUNEUF RANDON Dragonnet (10173058, 40692672) |
| Birth | 1250 | ? | d'ARTOIS Robert II Le Noble (25928724, 52341780) |
| Death | 4 September 1251 | ? | de SABRAN Sybille |
| Death | 1251 | Bagnères-de-Luchon Haute-Garonne France | de COMMINGES Pétronille Péronne (61690691) |
| Death | 1251 | ? | de SAINT VALÉRY Aénor Aliénor (30850565, 104683579) |
| Death | 1251 | ? | de PIERREPONT Jean II |
| Marriage | about 1251 | ? | d'ESTOUTEVILLE Jean 1er Le Géant (30834848, 246769128) with de CHATEAUDUN Isabeau (30834849, 246769129) |
| Death | about 1251 | ? | de ROUCY Jean II |
| Death | 1251 | ? | ARPAD Yolande (51811147, 51811163) |
| Death | 27 November 1252 | Paris Paris France | de CASTILLE Blanche (51857441, 104683581) |
| Birth | 1252 | ? | de LUXEMBOURG Philippa (12952789, 123397291) |
| Death | 1252 | ? | de SANCERRE Étienne II |
| Death | 1252 | ? | du HOMMET Guillaume III (15422658) |
| Death | 1252 | ? | de CASTILLE Ferdinand III El Santo (25905570, 493589136) |
| Birth | 1252 | ? | BERTRAN de BRICQUEBEC Robert VII (30834850, 246769130) |
| Death | 20 February 1253 | ? | de MONTFORT Amicie |
| Death | 13 December 1253 | ? | PAYNEL Guillaume (61690688) |
| Birth | 1253 | ? | de DAMPIERRE Marguerite |
| Death | 1253 | ? | de SAVOIE Amédée IV |
| Death | after 1253 | ? | de SABRAN Rosa |
| Birth | 1253 | ? | de GUILHEM Bérenger IV (40692678) |
| Marriage | about 1253 | ? | van GELDERN Otto with de DAMMARTIN Philippa |
| Death | 1253 | ? | de BÉTHUNE Adèle (123353649, 123595313) |
| Death | 1254 | ? | de THOUARS Catherine (123402555, 493589347) |
| Birth | 1254 | ? | de BRABANT Marie (12964361, 26170889) |
| Death | about 1254 | ? | de MELLO Marguerite La Jeune (30850563, 61797659) |
| Death | 1254 | ? | de VITRÉ Philippa (61701277, 246794673) |
| Death | 1254 | ? | aux ÉPAULES Albin (15422656) |
| Death | 1254 | ? | de CHÂTILLON Yolande (246794711, 493589159) |
| Birth | about 1254 | ? | d'ANJOU Charles II Le Boiteux (25905554, 25905582) |
| Birth | about 1255 | ? | BERTHOUT Mahaut (30850641, 61701305) |
| Birth | about 1255 | ? | BELSUNCE Arnaud |
| Birth | about 1255 | ? | du PONT Geoffroi (123397318) |
| Birth | 1255 | ? | de BAUGÉ Sybille (6475777) |
| Birth | 1255 | United Kingdom - Penpont, DG3, Dumfries and Galloway | de DEHEUBARTH Einion (23293952) |
| Birth | 1255 | ? | de CLERMONT Aélis Ou Alix Ou Philippa Ou Ide (30834851, 246769131) |
| Death | about 1255 | ? | de RANÇON Geoffroi IV (246794526, 246794670) |
| Birth | 1255 | ? | de CLERMONT dit de NESLE Gui 1er |
| Birth | about 1255 | ? | de DREUX Alix |
| Death | 1255 | ? | de MONTFORT l'AMAURY Alix |
| Birth | 1255 | ? | de GUELDRE Renaud 1er Le Querelleur |
| Birth | about 1255 | ? | de MALESTROIT Jeanne (123397319) |
| Birth | about 1255 | ? | d'AUVERGNE Robert III (81385364) |
| Birth | 1255 | ? | de MOYON PAYNEL Nicole (15422607) |
| Marriage | 1255 | ? | de DREUX Robert 1er (15425282) with de CHATEAUDUN Clémence |
| Death | about 1255 | ? | de BEAUMONT-GÂTINAIS Jean (30834858, 61669710) |
| Death | about 1255 | ? | de CHATEAUNEUF Auzilens |
| Birth | about 1255 | ? | AUBERT Adhémar (81385376) |
| Death | 12 May 1256 | ? | d'AMBOISE Mahaut |
| Marriage | May 1256 | ? | de NESLE Jean III with de MONTFORT Marguerite |
| Death | 1256 | ? | de HOLLANDE Guillaume 1er (103622308, 987178324) |
| Death | 1256 | ? | de BOURBON Marguerite |
| Birth | 1256 | ? | de CLERMONT Robert (123397288) |
| Death | 1256 | ? | de CASTILLE Bérangère 1ère (123381401, 123402557) |
| Death | 1256 | ? | de LASTIC Bompar 1er (162770948) |
| Death | 1256 | ? | de MAYENNE Isabelle |
| Marriage | 1256 | ? | de CASTILLE Ferdinand (246794568) with de MONTFORT Laure (246794569) |
| Marriage | 1256 | ? | de CHATEAUNEUF Gui Guiguon Randon (20346116, 81385344) with d'ANDUZE Randonne Vierne (20346117, 81385345) |
| Birth | 1257 | ? | de BOURGOGNE Béatrice (123397289) |
| Death | about 1257 | ? | de SASSENAGE Guigues III (80498882) |
| Death | 1257 | ? | de VASSALIEU Guillaume (40249462, 40249494) |
| Death | 1257 | ? | d'AVESNES Jean 1er (25905576, 246794580) |
| Birth | 1257 | ? | de PEYRE Astorg IX (40692674) |
| Marriage | 1257 | ? | de LAVAL Guy VII (61701276, 246794672) with de la GUERCHE Thomasse (123397255) |
| Birth | 1257 | ? | ARPAD DE HONGRIE Marie (25905555, 25905583) |
| Death | 15 August 1258 | ? | d'ESTOUTEVILLE Jean 1er Le Géant (30834848, 246769128) |
| Death | about September 1258 | ? | de SABRAN Guilhem Guillaume |
| Birth | about 1258 | ? | de LORÉ Robert 1er (7709616, 7724720) |
| Death | about 1258 | ? | de DREUX Alix Adélaïde |
| Birth | after 1259 | ? | de ROQUEFEUIL Raymond IV (40692686) |
| Death | 1259 | ? | de PIÉMONT Thomas II (12951552) |
| Birth | 1259 | ? | de CRAON Maurice VI (30850640, 61701304) |
| Death | 1259 | ? | de CHATEAUDUN Clémence |
| Birth | about 1260 | ? | de VENDEUIL Jeanne (15425285) |
| Birth | about 1260 | ? | URCUIT Esmène |
| Birth | about 1260 | ? | de CURVALLE Isabelle (20346387) |
| Birth | about 1260 | ? | de VISSAC Pons II (10173062, 40692614) |
| Birth | about 1260 | ? | de NESLE Jean IV |
| Marriage | about 1260 | ? | de MONTRAVEL Hugues (40692736) with de LASTIC Jeanne (40692737) |
| Birth | 1260 | ? | de SEREYS Bulhon (10173060, 40692612) |
| Death | 1260 | ? | des MOUSTIERS Roger (30845320) |
| Death | 1260 | ? | de MONTMORENCY Havoise |
| Birth | about 1260 | ? | de GOUDET Pons 1er (10173064, 40692616) |
| Death | 1260 | ? | de VENTADOUR Alix (325541457) |
| Birth | 1260 | ? | de CHEYLANE de MURAT Marguerite (40692675) |
| Marriage | 1260 | ? | de DREUX Robert IV (61698674, 123397342) with de MONTFORT Béatrix (61698675, 123397343) |
| Birth | about 1260 | ? | de ROQUEFEUIL Béatrix (10173059, 40692673) |
| Marriage | 1260 | ? | de NESLE-FALVY Jean II III with de DAMMARTIN Jeanne (25905571, 493589137) |
| Birth | about 1260 | ? | de ROCHEFORT Thibaut II (30850636, 123397314) |
| Birth | 1260 | ? | de LIMOGES Marie |
| Birth | 1260 | Paris Paris France | CAPET Agnès (12964367, 123397371) |
| Birth | about 1260 | ? | d'HARCOURT Luce (15417427, 123384567) |
| Birth | 1260 | ? | de CAYLUS Déodat II (40692676) |
| Birth | about 1260 | ? | de BOUSSAGUES Hélix (40692679) |
| Death | 12 June 1261 | ? | de LÉVIS Gui II (30849362, 30899606) |
| Birth | 1261 | ? | de DREUX Marie |
| Death | 1261 | ? | de BRABANT Henri III (25928722, 493589124) |
| Death | 1262 | ? | de ROUSSILLON Girard (40249442) |
| Death | 1262 | ? | d'AUVERGNE Robert 1er (325541456) |
| Death | 1262 | ? | de BOURBON Mahaut II (123397355) |
| Birth | 1262 | ? | de BRETAGNE Arthur II 1er (30849336, 61698670) |
| Death | 1262 | ? | Florence (20124739) |
| Marriage | 1263 | ? | de DREUX Robert 1er (15425282) with de VILLEBÉON de BAGNEUX Isabelle La Chambellane (15425283) |
| Death | 1263 | ? | de SAVOIE Boniface Le Roland |
| Birth | 1263 | ? | de DREUX Yolande (30849337, 61698671) |
| Birth | 1263 | ? | de DAMPIERRE Philippe |
| Death | 1263 | ? | de BEAUFORT Clémence (30845349, 246794649) |
| Death | 27 April 1264 | ? | de LAVAL Emma (123402553, 246762815) |
| Death | 1264 | ? | de CHÂTEAU GONTIER Jacques 1er (123381406, 987178606) |
| Birth | 1264 | ? | de DREUX Isabelle (7712641) |
| Marriage | 1264 | ? | de DAMPIERRE Guy (123397352) with de LUXEMBOURG Isabelle |
| Death | 1264 | ? | de BÉTHUNE Mathilde (123397353) |
| Death | 4 August 1265 | ? | de MONTFORT Simon VI |
| Death | about 1265 | ? | de MALESMAINS Fraslin II (61690692) |
| Birth | 1265 | ? | de RABASTENS Pierre Raymond II (10173192) |
| Birth | about 1265 | ? | de SAINT BONNET Estiena (10173065, 40692617) |
| Birth | about 1265 | ? | de MONTRAVEL Robert (20346368) |
| Birth | 1265 | ? | de DREUX Robert II |
| Birth | 1265 | ? | de DREUX Jean II Le Bon |
| Birth | about 1265 | ? | de BEAUMONT AU MAINE Marie (15422675, 123397325) |
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