From William the Conqueror to Lord of the Isles Otto de Grandison

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This descendancy has been much simplified to show clearly the line of descent from William the Conqueror to William de Grandison.


  • 1 Guillaume de Normandie (King William I of England) (1024-1087) m Matilda de Flandres (1032-1083)
    • 2 Richard de Normandie (1051-1069)
    • 2 Adelaide de Normandie (1053- )
    • 2 Robert de Normandie (1054-1134) m Sibyl de Conversano (1069-1103)
    • 2 Cecily de Normandie (1059-1127)
    • 2 King William II of England (1056-1100)
    • 2 Mathilda de Normandie (1061-1098) m Conan III de Bretagne (1091-1148)
    • 2 Princess Adela of England (1062-1138) m Comte Etienne III de Blois (1045-1102)
      • 3 Guillaume de Champagne (1080-1105) m Agnes de Sully (1065-1105)
      • 3 Agnes de Blois (1090- )
      • 3 Thibaud IV de Blois (1093-1152) m Maude de Carinthia (1097-1160)
        • 4 Marie de Blois (1129-1190) m Eudes de Bourgogne (1108-1162)
          • 5 Mathilde de Bourgogne (1140-1201) m Robert V d' Auvergne (1130-1194)
            • 6 Marie d' Auvergne (1175- ) m Albert de la Tour (1170-1218)
              • 7 Albert de la Tour (1200- ) m Beatrix de Coligny (1200- )
                • 8 Benoite de la Tour (1233-1278) m Amadeus de Grandison (1229-1300)
                  • 9 Otto de Grandison (abt 1250- )
                  • 9 William de Grandison (1263-1335) m Blanche de Savoie (1267-1323)
                    • 10 Agnes de Grandison (1289-1357) m Sir Thomas Bardolf (1282-1328)
                  • Second wife of William de Grandison - Sibyl de Tregoz (1271-1334)

Note: there is a dispute among Medieval genealogists over whether Otto and William de Grandison were the sons of Amadeus de Grandison or his brothers. Chronologically it seems very unlikely that the latter was true, but as always, dates of birth and death in the 13th century can be very inaccurate.

The line of descent from Guillaume de Montagu, Warden of the Isles from 1334-1337, to the Pauletts, who were Governors and Bailiffs in the 16th Century, and thence to the de Carteret family, is shown in the next tree.

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