 Maternally, his grandfather was Robert Unwin Harwood, and Michel-Eustache-Gaspard-Alain Chartier de Lotbinière was his great-grandfather.The seat of the chief of the Clan MacDonald of Keppoch was originally at Keppoch Castle which was near to Spean Bridge in Lochaber.In 1690 it passed to the Mackintoshes.