Family: Guillaume (William) de Mortaigne, Comte de Mortaigne, 3rd Earl of Cornwall / Countess Isabel FitzRichard de Clare (F15294)
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Male
Guillaume (William) de Mortaigne, Comte de Mortaigne, 3rd Earl of Cornwall
Birth 1060 Mortagne-au-Perche, Orne, Lower Normandy, France 
Death 1140 Bermondsey, London, England, United Kingdom Burial Bermondsey Abbey Marriage Father Robert de Mortagne, 2nd Earl of Cornwall, Count of Mortain | F14779 Group Sheet Mother Maude (Matilda) de Montgomery, Comtesse consort de Mortain | F14779 Group Sheet
Female
Countess Isabel FitzRichard de Clare
Birth Abt 1065 Tonbridge, Kent, England, United Kingdom Death 1121 Breconshire, Wales, United Kingdom Burial Father Richard FitzGilbert de Clare, de Bienfaite, Lord of Clare and of Tonbridge | F14934 Group Sheet Mother Rohese Giffard | F14934 Group Sheet
Male
Aldhelm De Mortaigne
Birth 1085 Burgh Castle, Norfolk, England, United Kingdom Death 1185 Norfolk, England Burial 1185 Norfolk, England
Female
Grecia de Cumberland
Birth 1110 Gilsland, Northumberland, England Death 1162 Chertsey, Surrey, England, United Kingdom Burial Spouse Hubert de Vaux, First Lord of Gilsland | F15280 Marriage 1149 Grisland, Cumberland, England