| | Roger Grenville 1477–1524 | | |
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| | Thomas Grenville 1426–1483 Elizabeth Gorges 1400–1470 | | |
| | Phillipa Bonnville 1405–… | | | | Theobald Grenville Sir …–… | | | | Matilda (Maud) Beaumont …–1467 | | | | Edward de Courtenay of Godlington 1329–1372 | | | | Hugh de Courtenay 2nd Earl of Devon 1303–1377 Margaret de Bohun 1311–1391 | | |
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| | | John Beaumont Lord Beaumont …–1342 Eleanor Plantagenet of Lancaster …–1372 | | | | Henry Beaumont Earl of Buchan 1288–1340 | | |
| | | Henry Plantagenet 3rd Earl of Leicester and Lancaster 1281–1345 Maud de Chaworth 1282–1322 | | |
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| | | | | | | Elizabeth FitzRoger 1370–1414 | | | | Margaret de Aubermarle 1345–… | | | | Nicholas Bonnville 1293–… Johanna Champernowne 1299–… | | |
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