Family: John de Beaumont / Eleanor Plantagenet, Countess Arundel (F3030)
m. Bef Jun 1337Henry Plantagenet, Earl of Lancaster (1281-1345) 
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Maud Chaworth (1282-1318)
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Maud Plantagenet (1298-1377)  |
| Blanche Plantagenet (1307- ) |
| Joan Plantagenet, Baron Mowbray (1310-1349) |
| John de Beaumont (1327-1342) |
| Eleanor Plantagenet, Countess Arundel (1312-1372)
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| Henry de Beaumont, Baron Beaumont (1340-1369) |