| b 1067, | William I Alencon, Count | d Oct1100, | Warin Montagne, Seigneur | |
| Geoffrey I Mortagne, Count | b 0989 | Hugh I Chateaudun, Viscount | ||
| | b 1015 | Melisende | Hildegarde | ||
| Rotrou Mortagne, Count | d 15 Dec 1031 | b 0991 | ||
| |b 1041 | | | |||
| | | Elensie | |||
| | | b 1017 | |||
| Geoffrey II Perche, Count | ||||
| |Beatrix Montdidier | | | |||
| | | | | |||
| Adeline | ||||
| b 1043 | | | |||
| 1 | < | Julienne Du Perche | 2 | < | Maud Perche, Countess |