William Marshall was born circa 1214 in England to John Marshall (-c1235) and Aline de Rye (-1266) and died circa 1264 England of unspecified causes. He married Elizabeth de Ferrers (c1250-c1300) .
Children
| Name | Birth | Death | Joined with |
| John Marshall (-1282) | 1240 England | 4 December 1282 England | Hawisia Unknown (-1301) |
Siblings
| Name | Birth | Death | Joined with |
| William Marshall (-c1264) | 1214 England | 1264 England | Elizabeth de Ferrers (c1250-c1300) |