Family: Sir John Fitz Geoffrey / Isabel Bigod, Duchess of Sussex (F6471)
m. Aft 1230Earl Geoffrey Fitz Piers, IV (1162-1213) 
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Aveline de Clare (1172-1225)
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| Hugh of Bigod, III, 3rd Earl of Norfolk (1186-1225)
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| Maud (Matilda) Marshall (1192-1248)
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Sir Hugh Bigod ( -1266)  |
| Sir John Fitz Geoffrey (1200-1258)
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| Isabel Bigod, Duchess of Sussex (1210-1282)
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| Isabel Fitz John, Lady Westmoreland (1233- ) |
| Maud Fitz John (1237-1301) |
| John Fitz John (1240-1275) |
| Richard Fitz John (1244-1301) |
| Avelina Fitz John (1248-1274) |
| Joan Fitz John (1250-1303) |
