 | 4th Earl of Hertford Gilbert de Clare (1180-1230) 
|
 | Countess Isabel Marshal (1200-1240)
|
| Agnes de Clare (1218- ) |
| Countess of Devon Amice de Clare (1220-1287)  |
| Lady of Annandale Isabel de Clare (1226-1264) |
| William de Clare (1228-1258) |
| Gilbert de Clare (1229- ) |
| 6th Earl of Gloucester Richard de Clare (1222-1262)
|
| Gilbert de Clare (1243-1295) |
| Rose de Clare (1255-1317) |
