Archibald Campbell (Lord Blythswood)
From Graces Guide
Born Archibald Douglas, the first holder was the son of Archibald Douglas, 17th feudal Scots baron of Mains and 12th feudal baron of Blythswood, a patrilineal descendant of James Douglas (who had assumed by Royal licence the surname of Douglas in lieu of Campbell), son of John Campbell and Mary, daughter and heiress of John Douglas of Mains. However John himself was also landed as the son of Colin Campbell, 1st feudal Scots Baron of Blythswood and that estate passed to another branch of the family.
The British 1st Baron Blythswood's father was born Archibald Douglas but assumed his new patronymic on 1838 on inheriting the Blythswood estate on the death of his cousin, Archibald Campbell.
Lord Blythswood was childless and on his death in 1908 the baronetcy became extinct.