| Male Baron William De Percy |
| Birth | 1088 | Alnwick, Northumberland, England |
| Death | 1175 | Tonbridge, Kent, England |
| Burial | ||
| Marriage | ||
| Father | ALAN, Baron, The Great, De Percy | F1244 Group Sheet | |
| Mother | Emma de Gaunt | F1244 Group Sheet | |
| Female Alice de Ros |
| Birth | 1090 | Alnwick, Northumberland, England |
| Death | 1112 | Yorkshire, England |
| Burial | ||
| Father | ||
| Mother | ||
| Male Baron William De Percy |
| Birth | 1112 | Alnwick, Northumberland, England |
| Death | 1168 | Topcliffe, Yorkshire, England |
| Burial | ||
| Spouse | Adeliza de Clare | F3146 | |
| Marriage | 1134 | |