Colonel James Alexander Francis Humberston Stewart-Mackenzie, 1st Baron Seaforth, JP, DL (9 November 1847 – 3 March 1923) was a Scottish soldier, who was regarded by many as chief of Clan Mackenzie.
His sister became a society hostess and politician, known as Mary Jeune, Baroness St Helier.
He then served as military secretary to Sir Mountstuart Grant Duff, Governor of Madras.
Following his retirement he devoted himself mainly to the management of his estates from his ancestral seat of Brahan Castle in Ross and Cromarty.
[citation needed] He was raised to the peerage in the 1921 New Year Honours for his services to Ross and Cromarty, taking the same title as his great-grandfather, Baron Seaforth, of Brahan in Urray in the County of Ross and Cromarty.