Sir John de Longvillers Knight
- Born: Abt 1195, Farnley, Leeds, Yorkshire, England
- Marriage (1): Elena Fitzwilliam
- Marriage (2): Ellen de Chaworth
- Died: 10 Feb 1254, Hornby Castle, Lancashire, England aged about 59
FamilySearch ID: LB9Q-41F.
John married Elena Fitzwilliam, daughter of Sir William FitzWilliam and Adela de Warenne. (Elena Fitzwilliam was born about 1200 in Lancashire, England and died in 1242.)
John next married Ellen de Chaworth. (Ellen de Chaworth was born in 1190 in Watnall Chaworth, Greasley, Nottinghamshire, England and died in 1263 in Hornby Castle, Hornby, Lincolnshire, England.)
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