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Robert Stewart, 1st Lord Lorn, was born on an unknown date to John Stewart (c1360-1421) and Isabel de Ergadia (-1439) and died before 1449 of unspecified causes. He married Joan Stewart (c1370-) 27 September 1397 JL .
Children
| Name | Birth | Death | Joined with |
| John Stewart (-1463) | 20 December 1463 Dunstaffnage | Fingula of The Isles Daughter MacLaren | |
| Agnes Stewart | |||
| Walter Stewart (-c1485) | |||
| Alan Stewart (-c1463) | |||
| David Stewart | |||
| Robert Stewart | |||
| Name | Birth | Death | Joined with |
| Daughter Stewart | |||
Siblings
| Name | Birth | Death | Joined with |
| Isabel Stewart (1375-) | |||
| James Stewart (c1383-aft1451) | 17 August 1451 | Joan Beaufort (c1406-1445) | |
| Jean Stewart | |||
| Robert Stewart (-bef1449) | 1449 | Joan Stewart (c1370-) | |
| Archibald Stewart | |||
| Christian Stewart | |||
| Alexander Stewart | |||
Residences
Footnotes (including sources)
| ‡ General |