William DE FERRERS, 4th Earl of Derby
Abt 1168 - Abt 1247 (~ 79 years)
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| Roger DE CLIFFORD, 2nd Baron de Clifford, 2nd Lord of Skipton | |
| B: | 21 Jan 1300 |
| D: | 23 Mar 1322 |
 | Idonia DE CLIFFORD Abt 1303- |
| Idonia DE CLIFFORD | |
| B: | Abt 1303 |
| Sir Henry PERCY, 9th Baron Percy of Topcliffe, 2nd Baron Percy of A | |
| B: | Abt 1298 |
| D: | 1352 |
| Robert DE CLIFFORD, 3rd Baron de Clifford, 3rd Lord of Skipton | |
| B: | 5 Nov 1305 |
| D: | 20 May 1344 |
| Robert DE CLIFFORD, 1st Baron de Clifford of Appleby Castle | |
| B: | 1 Apr 1274 |
| Clifford, Herefordshire, England | |
| D: | 24 Jun 1314 |
| Isabella DE VIEUXPONT -1291 |
| Isabella DE VIEUXPONT | |
| D: | 1291 |
| Roger DE CLIFFORD, Lord of Appleby | |
| D: | 6 Nov 1282 |
| Menai Straits, Anglesey, Wales | |
| Robert DE VIEUXPONT, Lord of Appleby | |
| D: | 1264 |
| Lewes, Sussex, England | |
| John DE VIEUXPONT -1241 |
| John DE VIEUXPONT | |
| D: | 1241 |
| John DE VIEUXPONT -1242 |
| John DE VIEUXPONT | |
| D: | 1242 |
| William DE FERRERS, 5th Earl of Derby Abt 1193-1254 |
| William DE FERRERS, 5th Earl of Derby | |
| B: | Abt 1193 |
| Stowe-by-Chartley, Staffordshire, England | |
| D: | 28 Mar 1254 |
| William DE FERRERS, 4th Earl of Derby Abt 1168-Abt 1247 |
| William DE FERRERS, 4th Earl of Derby | |
| B: | Abt 1168 |
| D: | Abt 1247 |