Complex sentence: Earl of Dumbarton was a peerage title in the Peerage of Scotland created on 9 March 1675 for the younger brother of the 1st Earl of Selkirk, Lieutenant General Lord George Douglas.
Split into simpler sentences: Earl of Dumbarton was a title in the Peerage of Scotland. It was created on 9 March 1675 for the younger brother of the 1st Earl of Selkirk, Lieutenant General Lord George Douglas.