Family: William Fitzalan / Isabel De Say (F21865)
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 | William Fitzalan (1105-1160)
|
 | Helen Peverel (1115- )
|
| Hugh De Say ( -1190)
|
| Mabel Marmion ( -1210) |
| William Fitzalan (1137-1210)
|
| Isabel De Say (1140- )
|
| John Fitzalan (1160-1240)  |