_Robert II STEWART __+
                                               | (1315 - 1390)       
                       _Robert III STEWART ____|
                      | (1337 - 1406)          |
                      |                        |_Elizabeth MURE _____
                      |                          (1319 - 1355)       
 _James I STEWART ____|
| (1394 - 1436) m 1424|
|                     |                         _____________________
|                     |                        |                     
|                     |_Anabella DRUMMOND _____|
|                       (1350 - 1401)          |
|                                              |_____________________
|                                                                    
|
|--Isabella STEWART 
|  (1426 - 1499)
|                                               _John BEAUFORT ______+
|                                              | (1371 - 1409)       
|                      _John BEAUFORT _________|
|                     | (1403 - 1444)          |
|                     |                        |_Margaret of HOLAND _
|                     |                          (1380 - 1439)       
|_Joan BEAUFORT ______|
  (1404 - 1445) m 1424|
                      |                         _John of BEAUCHAMP __
                      |                        |                     
                      |_Margaret of BEAUCHAMP _|
                        (1410 - 1482)          |
                                               |_Edith STOURTON _____