 FemaleMarchioness of Montferrat Isabel de Clare |
| Birth | May 1240 | Tonbridge, Kent, England  |
| Death | 1271 | |
| Burial | ||
| Father | Eighth Earl of Clare, Sixth Earl of Hertford, 6th Earl of Gloucester Richard de Clare, IV | F7461 Group Sheet | |
| Mother | Maud de Lacy | F7461 Group Sheet | |
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Male