William de PercyAge: 67 years1178–1245
- Name
- William de Percy
- Given names
- William
- Surname
- de Percy
| Birth | between 1178 and 1197 18 18 |
| Death of a paternal grandfather | Joscelin de Louvain 1180 |
| Death of a father | Henry de Percy 1196 |
| Birth of a son #1 | Henry de Percy 1228 (Age 50 years) |
| Death | 1245 (Age 67 years) |
| Family with parents |
| father |
Henry de Percy Birth: about 1160 30 26 — Alnwick, Northumberland, England Death: 1196 |
| mother |
Isabel? de Brus Birth: about 1160 — Skelton, Yorkshire, England |
| himself |
William de Percy Birth: between 1178 and 1197 18 18 — Alnwick, Northumberland, England Death: 1245 |
| Family with Joan de Briwere |
| himself |
William de Percy Birth: between 1178 and 1197 18 18 — Alnwick, Northumberland, England Death: 1245 |
| wife |
Joan de Briwere Birth: about 1190 — Stoke, Devonshire, England |
| son |
Henry de Percy Birth: 1228 50 38 — Alnwick, Northumberland, England Death: August 29, 1272 |