SOLWAY, Earl of, a title in the Scottish peerage, which, with the secondary titles of Viscount Tibberis, and Baron Douglas of Lockerby, Dalveen, and Thornhill, was conferred, by patent, dated 17th June 1706, on Lord Charles Douglas, third son of the second duke of Queensberry, afterwards third duke of Queensberry, and second duke of Dover. On his accession to the dukedom in 1711, it became merged in that title. Extinct on his death in 1778.