Colquhoun baronets

However, a third branch of the family, the Colquhouns of Tillyquhoun, also continued to assert themselves as baronets until their extinction in 1838.

On 30 March 1704, Sir Humphrey Colquhoun, the fifth Baronet, resigned his baronetcy to the Crown and on 29 April of the same year was granted a new patent, with the old precedence, but with remainder to his son-in-law James Grant and the heirs male of his marriage with Sir Humphrey's daughter.

James Grant succeeded as sixth Baronet according to the new patent and assumed the surname of Colquhoun in lieu of his patronymic.

On his succession to the earldom of Seafield, he assumed the additional surname of Ogilvy, styling himself Grant-Ogilvy.

The heir apparent is the present holder's eldest son Patrick John Colquhoun, Younger of Luss (b.