Family: John De Assheton / Margery Byron (F3792)
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 | Thomas De Assheton (1195- )
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 | Alice De Stoureton (1198- )
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| John Byron (1207- )
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| Joanna Thies (1210- )
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| John De Assheton (1225-1300)
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| Margery Byron (1227- )
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| Robert De Assheton (1244-1265)  |