William was the son of Alan de Winton and Margaret de Seton. The date and place of his birth have not been found.
He died about MAR 1409/10. The place is not known.
His wife was Janet Fleming. They were married, but the date and place have not been found. Their four known children were sir John (c1370-c1434), Alexander (c1382-1440/41), Janet (?-?) and Anna (?-?).
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William de Seton |
Alan de Winton |
Alan de Winton |
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Margaret Murray |
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Margaret de Seton |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Death | ABT MAR 1409/10 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | lord of Seton and Tranent |