The son of John Campbell of Clathick, he took the surname Colquhoun in 1804 on inheriting the estate of Killermont, Dunbartonshire.

Fifth son of John Campbell of Melfort, a member of a cadet branch of the Dukes of Argyll.

Campbell was the son of John Campbell, 2nd Earl of Breadalbane and Holland and Henrietta Villiers.

Campbell was the son of John Campbell, 5th Earl Cawdor and Wilma Mairi Vickers.

Campbell was the son of John Campbell, 1st Earl Cawdor and Lady Elizabeth Thynne.

He was the son of John and Annabelle Campbell.

Donald Campbell was born in a small town outside of Washington, D.C., the son of John and Nelle Campbell.

This son of John Campbell and Mary McDougall was then educated at Prince of Wales College, graduating in 1883.

He was born on the Isle of Skye, the son of John Campbell and Isabella McRae, and came to Nova Scotia in 1831.

Campbell was the son of John H. Campbell, the treasurer of Credit Clearing House, a credit-reference firm specializing in the garment industry.