His sister-in-law's claim to the Earldoms of Menteith and Fife allowed him to assume those titles, becoming Earl of Menteith and Earl of Fife.
Gugatan saudara iparnya atas wilayah-wilayah Earl Menteith dan Fife memungkinkan dia untuk mengambil gelar itu, menjadi Earl Menteith dan Earl Fife.