Alexander COMYN, Sheriff of Aberdeen
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| Henry, 3rd Baron DE BEAUMONT 1340-1369 |
| Henry, 3rd Baron DE BEAUMONT | |
| B: | 1340 |
| , Brabant,, Belgium | |
| D: | 25 Jul 1369 |
 | Margaret DE VERE Abt 1340-1398 |
| Margaret DE VERE | |
| B: | Abt 1340 |
| M: | Bef 15 Feb 1363 |
| D: | 15 Jun 1398 |
| Joan DE BEAUMONT -Aft 1400 |
| Joan DE BEAUMONT | |
| D: | Aft 1400 |
| John DE BEAUMONT, 2nd Lord Beaumont Abt 1318-1342 |
| John DE BEAUMONT, 2nd Lord Beaumont | |
| B: | Abt 1318 |
| D: | 14 Apr 1342 |
| a tournament, Northampton | |
| Eleanor PLANTAGENET, Countess Abt 1318-1372 |
| Eleanor PLANTAGENET, Countess | |
| B: | Abt 1318 |
| M: | 6 Nov 1330 |
| D: | 11 Jan 1372 |
| Arundel Castle, Arundel, West Sussex, England, 50.854649,-0.553930 | |
| Blanche PLANTAGENET, Duchess of Lancaster | |
| B: | 25 Mar 1345 |
| Lancaster, England | |
| D: | 12 Sep 1369 |
| Bolingbroke Castle, Lincolnshire, England, 53.16414,0.01638 | |
 | John PLANTAGENET 1340-1399 |
| John PLANTAGENET | |
| B: | 24 Feb 1340 |
| Abbey St. Bavon, Ghent, Flanders, Belgium | |
| M: | 13 May 1359 |
| Reading Abbey, Berkshire, England | |
| D: | 3 Feb 1399 |
| Castle Leicester, Leicester, Leicestershire, England, 52.632333,-1.141194 | |
| Sir Ralph DE STAFFORD -1347 |
| Sir Ralph DE STAFFORD | |
| D: | 1347 |
| Isabel DE BEAUMONT Abt 1320- |
| Isabel DE BEAUMONT | |
| B: | Abt 1320 |
| Henry PLANTAGENET, 1st Duke of Lancaster Abt 1310-1361 |
| Henry PLANTAGENET, 1st Duke of Lancaster | |
| B: | Abt 1310 |
| , Grosmont Castle, Monmouthshire, Wales | |
| M: | Bef 23 Jun 1330 |
| D: | 1361 |
| Alice COMYN, Countess of Buchan, Lady Beaumont | |
| B: | 1289 |
| D: | 3 Jul 1349 |
| Henry DE BEAUMONT, Knt., 1st Lord Beaumont, 1st Earl of Buchan and Foray | |
| B: | Bef 1280 |
| M: | 14 Jul 1310 |
| D: | 10 Mar 1340 |
| Henry, 3rd Baron DE BEAUMONT 1340-1369 |
| Henry, 3rd Baron DE BEAUMONT | |
| B: | 1340 |
| , Brabant,, Belgium | |
| D: | 25 Jul 1369 |
| Margaret DE VERE Abt 1340-1398 |
| Margaret DE VERE | |
| B: | Abt 1340 |
| M: | Bef 15 Feb 1363 |
| D: | 15 Jun 1398 |
| Joan DE BEAUMONT -Aft 1400 |
| Joan DE BEAUMONT | |
| D: | Aft 1400 |
| John DE BEAUMONT, 2nd Lord Beaumont Abt 1318-1342 |
| John DE BEAUMONT, 2nd Lord Beaumont | |
| B: | Abt 1318 |
| D: | 14 Apr 1342 |
| a tournament, Northampton | |
| Eleanor PLANTAGENET, Countess Abt 1318-1372 |
| Eleanor PLANTAGENET, Countess | |
| B: | Abt 1318 |
| M: | 6 Nov 1330 |
| D: | 11 Jan 1372 |
| Arundel Castle, Arundel, West Sussex, England, 50.854649,-0.553930 | |
| Unknown |