Robert I, of Artois
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| Thomas, 2nd Earl of Lancaster | |
| B: | Abt 1278 |
| D: | 22 Mar 1322 |
Unknown
| Alice DE LACY, 4th Countess of Lincoln | |
| B: | 25 Dec 1281 |
| Denbigh Castle, Denbigh, Denbighshire, Wales | |
| D: | 2 Oct 1348 |
| Barlings Abbey, Lincolnshire, England | |
| Henry, of Grosmont, 1st Duke of Lancaster | |
| B: | Abt 1310 |
| Grosmont Castle, Grosmont, Monmouthshire, England | |
| D: | 23 Mar 1361 |
| Leicester Castle, Leicestershire, England | |
| Isabel DE BEAUMONT, Duchess of Lancaster | |
| B: | Abt 1320 |
| D: | 1361 |
| Joan, of Lancaster | |
| B: | 1312 |
| Grosmont Castle, Monmouthshire, England | |
| D: | 7 Jul 1349 |
| Isabel, of Lancaster | |
| B: | Abt 1317 |
| D: | Aft 1347 |
| Eleanor PLANTAGENET, Lady Beaumont, Countess of Arundel | |
| B: | Abt 11 Sep 1318 |
| D: | Abt 11 Jan 1372 |
| Sir Richard FITZALAN, 3rd Earl of Arundel, 8th Earl of Surrey | |
| B: | Abt 1314 |
| Sussex, England | |
| D: | 24 Jan 1376 |
| Mary, of Lancaster | |
| B: | Abt 1320 |
| D: | 1362 |
| Henry DE PERCY, 3rd Baron Percy of Alnwick | |
| B: | Abt 1321 |
| D: | Abt 18 May 1368 |
| Alnwick, Northumberland, England | |
| Henry PLANTAGENET, 3rd Earl of Lancaster | |
| B: | Abt 1281 |
| D: | 22 Sep 1345 |
| Leicester Castle, Leicestershire, England | |
| Maud DE CHAWORTH | |
| B: | 2 Feb 1282 |
| D: | 3 Dec 1322 |
| Blanche, of Artois | |
| B: | Abt 1248 |
| D: | 2 May 1302 |
| Edward CROUCHBACK, 1st Earl of Lancaster | |
| B: | 16 Jan 1245 |
| D: | 5 Jun 1296 |
