Eleanor Plantagenet was born circa 1318 to Henry Plantagenet, 3rd Earl of Lancaster (1281-1345) and Matilda de Chaworth (1282-1322) and died 11 January 1372 of unspecified causes. She married John Beaumont, 2nd Baron Beaumont (c1317-1342) 6 November 1330 JL . She married Richard FitzAlan, 10th Earl of Arundel (c1313-1376) 1 February 1345 JL .
Children
| Name | Birth | Death | Joined with |
| Henry Beaumont, 3rd Baron Beaumont (1340-1369) | 1340 Vlaams-Brabant, Belgium | 25 July 1369 | Margaret de Vere (c1344-1398) |
| Joan Beaumont (-aft1400) | |||
| Name | Birth | Death | Joined with |
| Mary FitzAlan (c1356-bef1376) | |||
| Edmund FitzAlan (c1346-c1366) | |||
| Richard FitzAlan, 11th Earl of Arundel (1346-1397) | 1346 | 21 September 1397 Tower Hill, Greater London, England | Elizabeth de Bohun (c1350-1385) Philippa Mortimer (1375-1400) |
| Joan FitzAlan (1347-1419) | 1347 Arundel Castle, West Sussex, Sussex, England, United Kingdom | 7 April 1419 | Humphrey de Bohun, 7th Earl of Hereford (1341-1373) |
| John FitzAlan (c1348-1379) | 1348 | 16 December 1379 | Eleanor Maltravers (c1345-c1405) |
| Alice FitzAlan (c1350-1416) | 1350 | 17 March 1416 | Thomas Holland, 2nd Earl of Kent (1354-1397) |
| Thomas Fitzalan (c1352-1414) | |||
| Eleanor Fitzalan (c1355-bef1366) | |||
Footnotes (including sources)
| ‡ General |