Família: John Beaufort, Earl Sommerset / Margaret Holland (F7931)
John of Gaunt, Duke of Lancast. (1340-1399) 
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Catherine Swynford Roet (1350-1403) |
| Joan, Countess of Kent (1328-1385)
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| John Beaufort, Earl Sommerset ( -1410)
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| Margaret Holland ( -1439)
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John Beaufort, Duke Sommerset (1403-1444)  |