| Earl of Gloucester Gilbert de Clare & Isabel Marshall | |
| Husband | Wife |
| Earl of Gloucester Gilbert de Clare | Isabel Marshall |
|
b: 1182 Hertford, Hertfordshire, England d: 25 Oct 1230 |
b: 1206 Pembroke, Pembrokeshire, Wales d: 16 Jan 1240 |
| Marriage: on 9 Oct 1217. | |
| Parents | |
| Earl Richard de Clare (1162 - 1218) | Earl William Marshall (1144-1146 - 1219) |
| Amice Fitzrobert (1160 - 1224) | Isabel Fitzgilbert de Clare (1172 - 1220) |
| Grand Parents | |
| Earl The Good / (1116 - 1173) | John Marshall (1126 - 1164) |
| Maude St. Hillary (1132 - 1195) | Sybil de Evereaux |
| William Fitzrobert (1110 - 1183) | "Strongbow" / (1130 - Apr 1176) |
| Hawise de Beaumont (1134 - 1197) | Aoife of Leinster ( - 1186) |
| Children (Family Detail) | |
| Earl Richard de Clare | - b: 1222 |
| Isabel de Clare | - b: Abt 1225 |
| Gilbert de Clare | - b: 12 Sep 1229 Gloucestshire, England |