At this juncture, Rear-Admiral Lachlan Donald Mackintosh CB DSO DSC, he became chief of Clan Mackintosh, separate from but "in and under Mackintosh of Mackintosh-Torcastle as Head of the haill kin of Clan Chattan". Clan Mackintosh remains the principal clan of the Clan Chattan confederation and the current and past Mackintosh of Mackintosh has been President of the Clan Chattan Association. On 8 September 1912 Mackintosh married Ellen Primrose Smith, daughter of Frederick Smith. Mackintosh died on 29 May 1966. He was survived by his wife, three sons and two daughters.