William (4th Baron Percy) De Percy
1112 - 1175 (63 years)
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| Alan De Percy -Aft 1166 |
| Alan De Percy | |
| D: | Aft 1166 |
 | Maud De Percy -1205 |
| Maud De Percy | |
| D: | 1205 |
| William (Earl of Warwick) De Newburgh | |
| D: | 15 Nov 1184 |
| Holy Land | |
| William (of Topcliffe) De Percy Aft 1202-1245 |
| William (of Topcliffe) De Percy | |
| B: | Aft 1202 |
| D: | 28 Jul 1245 |
| Ellen De Balliol -1281 |
| Ellen De Balliol | |
| D: | 22 Nov 1281 |
| Joan Briwere -Bef 1233 |
| Joan Briwere | |
| D: | Bef 12 Jun 1233 |
| Henry De Percy -Yes, date unknown |
| Henry De Percy | |
| D: | Yes, date unknown |
| Henry De Percy -1198 |
| Henry De Percy | |
| D: | 1198 |
| St Lo, Rouen | |
| Isabel De Brus -Yes, date unknown |
| Isabel De Brus | |
| D: | Yes, date unknown |
| Ralph De Percy -Yes, date unknown |
| Ralph De Percy | |
| D: | Yes, date unknown |
| Richard (5th Baron Percy) De Percy | |
| D: | Aug 1244 |
| Agnes De Neville -Yes, date unknown |
| Agnes De Neville | |
| D: | Yes, date unknown |
| Alice -Yes, date unknown |
| Alice | |
| D: | Yes, date unknown |
| Jocelin De Percy -Yes, date unknown |
| Jocelin De Percy | |
| D: | Yes, date unknown |
| Eleanor De Percy -Yes, date unknown |
| Eleanor De Percy | |
| D: | Yes, date unknown |
| Alice De Percy -Yes, date unknown |
| Alice De Percy | |
| D: | Yes, date unknown |
| Maud De Percy -Yes, date unknown |
| Maud De Percy | |
| D: | Yes, date unknown |
| John De Daiville -Yes, date unknown |
| John De Daiville | |
| D: | Yes, date unknown |
| Agnes De Percy -Bef 1204 |
| Agnes De Percy | |
| D: | Bef 13 Oct 1204 |
| Joscelyn De Louvain -1180 |
| Joscelyn De Louvain | |
| M: | Aft 1154 |
| D: | 1180 |
|
| William (4th Baron Percy) De Percy 1112-1175 |
| William (4th Baron Percy) De Percy | |
| B: | 1112 |
| D: | 1175 |
| Adela (Adelaide) De Tonbridge De Clare | |
| D: | 1148 |