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

Sybil was born in 1271 in Ewyas, Herefordshire, England.1   Sybil's father was John De Tregoz and her mother was Mabel Fitzwarin.  Her paternal grandparents were Robert De Tregoz and Juliana De Cantilupe; her maternal grandparents were Fulk Fitz Warin and Constance De Toni.  She was an only child.  She died at the age of 63 on October 12th, 1334.1 

Family Details of Sybil's family with William De Grandison

1 phelps1609.FTW
Further source/citation:
World Family Tree Vol. 16, Ed. 1 @ Tree #1609