Thomas MacDowall, 6th of Garthland was born on an unknown date to Uchtred Macdowall, 5th of Garthland (-c1470) and Unknown Vans (-c1470) .
Children
| Offspring of Thomas MacDowall, 6th of Garthland and Unknown Fraser (-c1488) | |||
| Name | Birth | Death | Joined with |
| Uchtred Macdowall, 7th of Garthland (-1513) | Scotland | 9 September 1513 Northumberland, England | Isobel Gordon (-aft1513) |
| Jean MacDowall | |||
