| Earl William Marshall & Isabel Fitzgilbert de Clare | |
| Husband | Wife |
| Earl William Marshall | Isabel Fitzgilbert de Clare |
|
b: 1144/1146 Of, Pembroke, Pembrokeshire, Wales d: 14 May 1219 |
b: about 1172 Of, Pembroke, Pembrokeshire, Wales d: 1220 |
| Marriage: Aug 1189 in London, Middlesex, England. | |
| Parents | |
| John Marshall (~1126 - 1164) | Richard "Strongbow" de Clare (~1130 - ~1176) |
| Sybil de Evereaux | Aoife of Leinster ( - >1186) |
| Grand Parents | |
| Gilbert Marshall (~1100 - 1130) | Gilbert "Strongbow" de Clare (~1085 - 1147/1148) |
| Isabel de Beumont | |
| Walter de Evereaux | |
| Sybill de Chaworth | |
| Children (Family Detail) | |
| Countess Maud Marshall | - b: 1190 of Pembroke, Wales |
| William "the Surety" Marshall II | - b: about 1195 |
| Eve Marshall | - b: about 1194 Of, Pembroke, Pembrokeshire, Wales |
| Isabel Marshall | - b: 1206 Pembroke, Pembrokeshire, Wales |