Family: 4th Earl of Hertford and 5th Earl of Gloucester Gilbert de Clare, III / Countess of Cornwall Isabel Marshall (F7486)
m. 9 Oct 1217Drag or scroll to see more of the chart.
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 | Earl of Clare Richard de Clare (1153-1217)
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 | 1st Earl of Pembroke William Marshall, the Elder (1146-1219) |
 | 4th Countess of Pembroke Isabella de Clare (1172-1220)
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| Sibyl Marshall (1209-1245)  |
| Countess of Cornwall Isabel Marshall (1200-1240)
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| Eighth Earl of Clare, Sixth Earl of Hertford, 6th Earl of Gloucester Richard de Clare, IV (1222-1262) |
| Isabel de Clare (1226-1264) |