| b 1041, | William I Alencon, Count | |||
| Warin Montagne, Seigneur | b 0963 | |||
| | b 0989 | ||||
| Geoffrey I Mortagne, Count | d 1026 | |||
| |b 1015 | | | Hugh I Chateaudun, Viscount | ||
| |d 15 Dec 1031 | Melisende | b 0965 | ||
| | | b 0991 | Hildegarde | ||
| Rotrou Mortagne, Count | b 0967 | |||
| |Adeline | | | |||
| | | | | |||
| Elensie | ||||
| b 1017 | | | |||
| 1 | < | Geoffrey II Perche, Count |