Roger de Beauchamp
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- 1 Roger de Beauchamp [1]
- Mary
- 2 John de Beauchamp [1.1]
- Edith Stourton
- 3 Margaret de Beauchamp [1.1.1] b. 1410 d. 8 Aug 1482
- Oliver St John
- 4 John St John [1.1.1.1]
[ =>]
- 4 John St John [1.1.1.1]
- 1st Duke of Somerset John Beaufort b. 25 Mar 1404 d. 27 May 1444
- 4 Lady Margaret Beaufort [1.1.1.2] b. 31 May 1443 d. 29 Jun 1509
[ =>]
- 4 Lady Margaret Beaufort [1.1.1.2]
- 3 Margaret de Beauchamp [1.1.1]
- 2 John de Beauchamp [1.1]