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Female Sibyl de Montague Click to view Sibyl de Montague in the family tree

Sibyl was born in 1334 in Windsor Castle, Berkshire, England.1   Sibyl's father was William De Montague and her mother was Katherine De Grandison.  Her paternal grandparents were William De Montague and Elizabeth De Montfort. She had three brothers and three sisters, named John, William III, <Unknown>, Elizabeth, Phillipa and <Unknown>.  She died at the age of 40 on June 30th, 1374 in Castle Arundel, Sussex, England.1 

Family Details of Sibyl's family with Sir Edmund FitzAlan

1 Katherine de Grandison.ged
Further sources/citations:
CALDWELL.FTW, CALDWELL.GED

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