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 | Pedigree Chart|  |  |  |  |  |  |  |  |  |  |  | | 8 William DE THWENG (*) b: 1345 in Helmsey, Yorkshire, England
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 d: 1390 in Helmsey, Yorkshire, England
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 |  |  |  |  |  |  |  |  |  | | 4 Walter THWENG (*) b: 1375 in Upper Helmsley, Yorkshire, England
 m: 1395
 d: 1430 in Upper Helmsley, Yorkshire, England
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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | | 2 George THWENG Sr. (*) b: 1418 in Upper Helmsley, Yorkshire, England
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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | | 5 Margaret DE LA SEE (*) b:
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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | | 1 George THWENG Jr. (*) b: 1462 in Upper Helmsley, Yorkshire, England
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