Nielsen Hayden genealogy
Family: William I de Mandeville / Margaret fitz Eudes (F1209)
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Male
William I de Mandeville
Birth of Great Waltham, Essex, England 
Death Bef May 1116 Burial Marriage Father Geoffrey I de Mandeville | F592 Group Sheet Mother Adeliza de Balts | F592 Group Sheet
Female
Margaret fitz Eudes
Birth Death Burial Father Eudes fitz Hubert | F57 Group Sheet Mother (Unknown first wife of Eudes fitz Hubert) | F57 Group Sheet
Female
+ Beatrice de Mandeville
Birth Abt 1105 Death Bef 19 Apr 1197 Rickling, Saffron, Essex, England 
Burial Walden Abbey, Essex, England 
Spouse William de Say | F1124 Marriage Spouse Hugh Talbot | F17727 Marriage