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Female Isabel Bigod Click to view Isabel Bigod in the family tree

Isabel was born about 1222 in Of, Thetford, Norfolk, England.1   Isabel's father was Hugh Le Bigod and her mother was Maud Matilda Marshall.  Her paternal grandparents were Roger Bigod and Ida Unknown; her maternal grandparents were William Marshall and Isabel Fitzgilbert De Clare. She had six brothers named Ralph, Roger, John, Hugh, William Le and Simon Le.  She was the youngest of the seven children.  She died in 1239.1 

Family Details of Isabel's family with Sir John Fitz Geoffrey

1 phelps1609.FTW
Further sources/citations:
World Family Tree Vol. 16, Ed. 1 @ Tree #1609, World Family Tree Vol. 4, Ed. 1 @ Tree #0574, 0574.ftw, phelps.FTW @ Tree #1353