William de Ferrers, 3rd Earl of Derby
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| PARENT (M) Robert de Ferrers, 2nd Earl of Derby | |||
| Birth | |||
| Death | |||
| Marriage | to Margaret Peverell, Countess of Derby | ||
| Father | Robert de Ferrers, 1st Earl of Derby | ||
| Mother | Hawise | ||
| PARENT (F) Margaret Peverell, Countess of Derby | |||
| Birth | |||
| Death | |||
| Marriage | to Robert de Ferrers, 2nd Earl of Derby | ||
| Father | William Peverel the Younger | ||
| Mother | Avicia de Lancaster | ||
| CHILDREN | |||
| M | William de Ferrers, 3rd Earl of Derby | ||
| Birth | |||
| Death | |||
| Marriage | to Sybil | ||
| PARENT (M) William de Ferrers, 3rd Earl of Derby | |||
| Birth | |||
| Death | |||
| Marriage | to Sybil | ||
| Father | Robert de Ferrers, 2nd Earl of Derby | ||
| Mother | Margaret Peverell, Countess of Derby | ||
| PARENT (F) Sybil | |||
| Birth | |||
| Death | |||
| Marriage | to William de Ferrers, 3rd Earl of Derby | ||
| Father | William de Braose, 3rd Lord of Bramber | ||
| Mother | Bertha of Hereford | ||
| CHILDREN | |||
| M | William de Ferrers, 4th Earl of Derby | ||
| Birth | |||
| Death | |||
| Marriage | to Agnes De Kevelioch | ||
+ Sybil
+ Margaret
+ ?
4 Joan de Ferrers d: 19 MAR 1309
+ Thomas de Berkeley, 1st Baron Berkeley Knight b: 1245 d: 23 JUL 1321
6 Maurice de Berkeley Knight d: 12/12 FEB 1346/1347
+ Margery de Vere d: 21 MAY 1351
7 Thomas de Berkeley Knight b: ABT 1334 d: BEF 29 SEP 1361
+ Katherine Botetourt d: 22/22 JAN 1387/1388
8 Maurice Berkeley Knight b: 1 JUN 1358 d: 2 OCT 1400
+ Joan Dinham d: 22 AUG 1412
9 Maurice Berkeley Knight b: 2/02 FEB 1400/1401 d: 26 NOV 1464
10 William Berkeley Knight, K.B. b: ABT 1436 d: 1501
+ Anne Stafford d: 1503