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| | Conqueror |
 | | Murdered by the sons of Simon de Montfort at Viterbo, Italy and buried in Hayes Abbey, Gloucestershire, Md. 5/15.5.1269 at Windsor Castle, Berkshire, Constance de Moncada, + c.1299, dau of Gaston VII de Moncada, Viscount of Bearn and Matilda de Mastas. |
 | | Guy de Montfort, Count of Nola, * c.1243, + c.1288, Md., Margaret of Anguillara, dau of Aldobrandino Aldobrandeschi, Count of Anguillara. |
 | | Geoffrey Plantagent, Count of Nantes, * 1.6.1134, + 26.7.1158 at Nantes, Brittany. |
| www.william1.co.uk /w1.html (1942 words) |
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