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Female Sybil Marshal Click to view Sybil Marshal in the family tree

Sybil's father was William Marshall and her mother was Isabel de Clare.  Her paternal grandparents were John FitzGilbert and Sybille d'Evereaux; her maternal grandparents were Richard de Clare and Aoife MacMurrough. She had three sisters named Maud, Isabel and Eva.  She died before 1238.1 

Family Details of Sybil's family with William de Ferrers

1 Weis, Magna Charta Sureties, 4th edition

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