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 | 4th Earl of Hertford Gilbert de Clare (1180-1230)
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 | Countess Isabel Marshal (1200-1240)
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| Agnes de Clare (1218- ) |
| Countess of Devon Amice de Clare (1220-1287)  |
| 6th Earl of Gloucester Richard de Clare (1222-1262) |
| William de Clare (1228-1258) |
| Gilbert de Clare (1229- ) |
| 5th Lord of Annandale Robert de Brus (1215-1295)
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| Lady of Annandale Isabel de Clare (1226-1264)
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