| Male William III Talvas, Count of Ponthieu and Montreuil |
| Birth | 1179 | France |
| Death | 4 Oct 1221 | France |
| Burial | ||
| Marriage | 20 Aug 1195 [1, 2, 3, 4] | Meudon, Γle-de-France, France [1, 2, 3, 4] |
| Father | Jean I, Count of Ponthieu and Montreuil | F4153 Group Sheet | |
| Mother | Beatrice of Saint Pol | F4153 Group Sheet | |
| Female Alys of France, Countess of Vexin |
| Birth | 4 Oct 1160 | France |
| Death | About 1220 | |
| Burial | ||
| Father | Louis VII, King of France | F2212 Group Sheet | |
| Mother | Constance of Castile | F2212 Group Sheet | |
| Female + Marie of Ponthieu, Countess of Ponthieu and Montreuil |
| Birth | 17 Apr 1199 | France |
| Death | Sep 1250 | France |
| Burial | ||
| Spouse | Simon II de Dammartin, Count of Aumale | F2319 | |
| Marriage | Sep 1208 | |
| Spouse | Matthew de Montgomery, Seigneur de Montmorency | F6221 | |
| Marriage | ||
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Sources π’ Primary Evidence π‘ Secondary Evidence π Tertiary Evidence π΄ Unreliable Evidence |
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