Genealogy of the Bryan and Martin Families
Family: Robert Courtenay, Baron Okehampton / Mary de Vernon (F1797)
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Renaud de Courtenay ( -1194)
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Hawise de Courcy, Lady of Okehampton (1158- )
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| Robert Courtenay, Baron Okehampton ( -1242)
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| Mary de Vernon ( -1245) |
John Courtenay, Baron Okehampton ( -1274)  |