Elle est mariée avec Guy II 10th Earl of Warwick de Beauchamp DNA49 tbc.
Ils se sont mariés en l'an 1316 à England, elle avait 52 ans.
Spouse: Maurice de Berkeley, 2nd Baron Berkeley
Enfant(s):
Isabella de Clare, Baroness Berkeley<br>Gender: Female<br>Birth: Mar 10 1263 - Elmley Castle, Elmley, Worcestershire, England<br>Marriage: Spouse: Maurice de Berkeley, 2nd Baron Berkeley - 1316<br>Death: 1333 - Elmley Castle, Elmley, Worcestershire, England<br>Father: Gilbert "the Red Earl" de Clare, 6th Earl of Hertford, 7th Earl of Gloucester<br>Mother: Alice de Lusignan, de Angouleme<br>Husbands: Guy de Beauchamp, 10th Earl of Warwick, Maurice de Berkeley, 2nd Baron Berkeley<br>Child: Elizabeth (born de Beauchamp)<br>Sibling: Johanna MacDuff (born de Clare)
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Isabelle De Clare<br>Gender: Female<br>Marriage 2: Guy 10Th Earl of Warwick de Beauchamp<br>Father: Gilbert 7Th Earl of Gloucester de Clare<br>Mother: Alice de Lusignan<br>Source: View the original record on GenealogieOnline website<br>Source Remarks: Some family trees were posted years ago and have later been removed. In such cases, the link to the original record will not work.