Family: Lord John Trethurffe / Lady Joan Trenoweth (F8267)
m. 1393
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 | Ralph Trenoweth (1377-1427)
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 | Jane Basset (1372- )
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| Margaret Trenowith (1400-1471)  |
| John Trenoweth (1403-1444) |
| Lord John Trethurffe (1365-1444) |
| Lady Joan Trenoweth (1380-1460)
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| Reginald Trethurffe (1410-1458) |