

| 1. | Sir. William de Percy, Baron was born in 1112 in Whitby, North Riding, Yorkshire, England; died in 1175; was buried in Fountains Abbey, Harrogate Borough, North Yorkshire, England. William married Adeliza de Clare in 1136 in Alnwick, Northumberland, England. Adeliza (daughter of Richard I de Clare and Alice de Meschines) was born about 1115 in Royal Tunbridge Wells, Kent, England; and died. [Group Sheet] [Family Chart]
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| 2. | Richard de Percy |
| 3. | Walter de Percy |
| 4. | Alan de Percy Alan married Mrs. Alan de Percy about 1165 in of Sallay, West Riding, Yorkshire, England. Alan was born about 1145 in of Sallay, West Riding, Yorkshire, England; and died. [Group Sheet] [Family Chart] |
| 5. | Maud de Percy Maud married William Beaumont, Earl of Warwick about 1166 in of Sallay, West Riding, Yorkshire, England. William was born about 1139 in of, , Warwickshire, England; died on 15 Nov 1184. [Group Sheet] [Family Chart] |
| 6. | William Percy, III |
| 7. | Agnes de Percy Agnes married Joscelin de Lorraine, I in 1154 in Egmanton, Nottinghamshire, England. Joscelin (son of Duke Duke Godfrey de Lorraine and Clementia de Lombardy) was born about 1113 in Brabant, Antwerp, Belgium, Netherlands; was christened in of Louvain, Brabant, Belgium, Netherlands; died in 1178 in Egmanton, Nottinghamshire, England. [Group Sheet] [Family Chart]
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| 8. | Sheriff of Northumberland Henry de Percy, I Sheriff married Isabel de Brus in 1196 in Cleveland, Ormesby, North Riding, Yorkshire, Egland. Isabel was born about 1169 in Cleveland, North Riding, Yorkshire, England; died after 1230. [Group Sheet] [Family Chart]
Sheriff married about 1215. [Group Sheet] [Family Chart] |
| 9. | Joscelaine II de Percy |
| 10. | Robert de Percy |
| 11. | Eleonor de Percy |
| 12. | Richard de Percy Richard married Joan de Braose about 1202 in Alnwick, Northumberland, England. Joan was born about 1175 in of, Bramber Castle, Sussex, England; and died. [Group Sheet] [Family Chart] |
| 13. | Alice de Percy |
| 14. | Maud de Percy Maud married John de Daiville about 1195 in Egmanton, Nottinghamshire, England. John was born about 1171 in Egmanton, Nottinghamshire, England; died before 1242 in Egmanton, Nottinghamshire, England. [Group Sheet] [Family Chart] |
| 15. | Sir. Baron Sir William de Percy Baron married Joan de Briwere about 1215 in of, Warwick, Warwickshire, England. Joan was born about 1193 in Stoke, Devon, England; and died. [Group Sheet] [Family Chart]
Baron married Eleanor de Balliol in 1226 in Dalton Piercy, Hart, Durham, England. Eleanor (daughter of Sir. Ingelram de Baliol, Baron and Agnes de Berkeley) was born about 1200 in Alnwick, Northumberland, England; died before 22 Nov 1281. [Group Sheet] [Family Chart]
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| 16. | Henry II de Percy Henry married Mrs. Isabel de Percy about 1215 in Alnwick Castle, Alnwick, Northumberland, England. Isabel was born about 1199 in Alnwick Castle, Alnwick, Northumberland, England; and died. [Group Sheet] [Family Chart] |
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