His successor was his son William, who joined the Jacobite standard at Braemar, during the rising of 1715, and then, having raised 3000 men, was present at the battle of Sheriffmuir and was appointed lieutenant-general of the northern counties. He also took part in the Jacobite enterprise of 1719, being wounded at Glenshiel. In 1716 he was attainted and his titles and estates forfeited; before his death in January 1740, he had been relieved of some of the penalties of his treason, although his titles were not restored. His son Kenneth (c. 1718–1761), who but for the attainder would have been the 6th earl, helped the British government during the rising of 1745, and was a member of parliament for some years.