Alexander de Swinburne
- Born: Abt 1260, Capheaton, Northumberland, England
- Marriage (1): Agnes de Thornhill about 1284 in Kirk Whelpington, Northumberland, England
- Died: 26 May 1309, Northumberland, England aged about 49
FamilySearch ID: LYNS-VB9.
Alexander married Agnes de Thornhill, daughter of Sir Richard de Thornhill and Margaret de Fixby, about 1284 in Kirk Whelpington, Northumberland, England. (Agnes de Thornhill was born about 1264 in Thornhill, Yorkshire, England and died after 1332 in Berwick upon Tweed, Northumberland, England.)
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