Genealogy of the Bryan and Martin Families
Family: Gwenwynwyn, Lord of Powis / Margaret Corbet (F1720)
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Owen Cyfeiliog, Prince of Powis ( -1197)
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Gwenllian ( -1200)
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| Gwenwynwyn, Lord of Powis ( -1218)
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| Margaret Corbet ( -1220) |
Griffith, of Powis (1230- )  |