Notes:

CHARLES, de jure fifth Lord Mordingtoun, but he never assumed the title. He was concerned in the rebellion of 1745, was taken prisoner, and arraigned at Carlisle 11 September 1746, as Charles Douglas, Esq. He
then pleaded his Peerage as heir-male of the body of the second Lord Mordingtoun, and the plea, though opposed by the Crown, seems to have been allowed, without any proof having been required as to the limitation of the dignity being, as he alleged, to the male heir. He appears to have died s.p. certainly before 1791.

Some sources report him to be a brother to the 4th Lord.