Family: Robert de Mortagne, 2nd Earl of Cornwall, Count of Mortain / Maude (Matilda) de Montgomery, Comtesse consort de Mortain (F14779)
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Male
Robert de Mortagne, 2nd Earl of Cornwall, Count of Mortain
Birth 1031 Mortagne-au-Perche, Orne, Lower Normandy, France 
Death 8 Dec 1090 Mortain, Manche, Lower Normandy, France Burial Dec 1090 Mortain, Manche, Lower Normandy, France Marriage France Father Mother
Female
Maude (Matilda) de Montgomery, Comtesse consort de Mortain
Birth 1041 Calvados, Normandy, France Death 1085 Fatouville-Grestain, Eure, Upper Normandy, France Burial Normandy, France Father Mother
Female
Agnes de Mortaigne, of Mortain
Birth 1054 Appeville-Annebault, Eure, Upper Normandy, France Death 1115 Appeville-Annebault, Eure, Upper Normandy, France Burial
Female
Hertiginna av Toulouse Emma de Mortain, comtesse consort de Toulouse
Birth 1058 Mortagne-au-Perche, Orne, Lower Normandy, France Death Oct 1080 Huesca, Aragon, Spain Burial Spouse William (Guillaume) IV de Tolosa, Count of Toulouse, Margrave of Provence | F14741 Marriage 1067
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 Spouse Countess Isabel FitzRichard de Clare | F15294 Marriage