Member Information
| Full Name | ♀️ Isabel FitzReynold -  |
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| Father | Reynold (Reginald) I "Lord of Brecknock" FitzPiers | ||
| Mother | Joan Jeanne de Vivonne | ||
| Siblings | ♀️ Beatrice De Vivonne, ♂️ Matthew FitzReynold, ♂️ Reynold FitzReynold, ♂️ William FitzReynold, ♂️ Peter FitzReynold, Lord of Chewton | ||
| Death | #1 | Date of death | 1286 |