John MacDowall, 9th of Garthland was born 1507 in Scotland to Uchtred MacDowall, 8th of Garthland (-c1531) and Marion Stewart (-c1531) and died 10 September 1547 Battle of Pinkie Cleugh, Scotland of unspecified causes. He married Margaret Campbell (-1537) .
John MacDowall, 9th of Garthland, with his wife had half the barony of Corswall by charter under the Great Seal of Queen Mary and acquired the other half from the other co-heir, upon his marriage to Margaret Campbell, the daughter and co-heiress of Finlay Campbell of Corswall. John MacDowall was killed at the Battle of Pinkie Cleugh on 10 September, 1547.
|Offspring of John MacDowall, 9th of Garthland and Margaret Campbell (-1537)|
|Uchtred MacDowall, 10th of Garthland (1546-1593)||1546 Galloway, Scotland||1593 France||Margaret Kennedy (1560-1578) Margaret Kennedy (1560-1578) Margaret Stewart (-aft1578)|