Genealogy of the Bryan and Martin Families
Family: Marmaduke de Thwenge, 1st Lord Thwenge / Isabel de Ros (F1763)
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Marmaduke de Thwenge ( -1283)
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Lucy de Brus ( -1285)
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| William de Ros (1255- ) |
| Eustache Fitzhugh (1255- )
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| Isabel de Ros (1280- )
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Katherine de Thwenge (1305- )  |