3. Alexander, who died young.
4. John, who died unmarried.
5. Alexander, of Breda, Aberdeenshire, who married Maria Rebecca, daughter of Colonel William Humberston Mackenzie of Conansbay, and sister of the last Lord Seaforth, with issue - (1) William, a Lieutenant in the 78th Regiment, died at Breda in Holland of a wound he had received the previous day at the taking of Merxem, in 1814; (2) Thomas, a midshipman, R.N., drowned at sea; (3) Frederick, R.N., murdered at Calcutta, in 1820; (4) Francis, R.N., drowned at sea in 1828; (5) John, all without issue; and (6) Alexander, Captain, 25th Regiment, and Adjutant of the Ross-shire Militia, who took a great interest in the history of his Clan and collected a large amount of information and valuable MSS. He married Lilias Dunbar, daughter of James Fowler of Raddery, with issue - (1) James Evan Fowler, who died unmarried; (2) Alexander, now at Fortrose and three daughters, who died unmarried. Alexander of Breda, who died in 1872, had also four daughters, two of whom, Louisa and Gertrude Elizabeth, died unmarried; Margaret, who married the Rev. Charles Grant, minister of the Scottish Episcopal Church at Meikle Folla, with issue - nine children. She died in 1871. The youngest, Mary Gibbs, married on the 25th of March, 1827, George Skues, Lieutenant Royal Marines, Aberdeen, with issue - (1) William Mackenzie, M.D., Surgeon-Major in the Army, who married Margaret, daughter of Christopher Hyre, Newfoundland, with issue, three sons and five daughters - George Edward Mackenzie; Frederick William Mackenzie; Charles Hyre Mackenzie; Mary Isabella Mackenzie; Margaret Caroline Mackenzie; Gertrude Eliza Mackenzie; Minnie Mackenzie, and Elsie Mackenzie; (2) Edward Walker, Staff-Surgeon in the Army, who died at Calcutta, unmarried, in 1862; (3) Frederick Mackenzie, Surgeon-Major in the Army, who married Maria Theresa Malcolm, with issue - two sons, Frederic Mackenzie and Edward George, and two daughters, Mary Theresa and Margaret Sarah; (4) Richard Alexander, residing in America; (5) John Richards; (6) Georgina Mary, and two daughters who died in infancy.
6. Margaret, who married Alexander Mackenzie, IV. of Muirton of Kilcoy with issue.
7. Elizabeth, who in 1755 married Donald Matheson of Attadale, with issue - from whom Sir Kenneth James Matheson, Baronet, now of Lochalsh and Ardross.
8. Anne, who married James Rose of Cuilich, with issue; and seven other daughters who died unmarried.
He was succeeded by his eldest son,
IV. THOMAS MACKENZIE, fourth of Highfield, who afterwards succeeded his uncle, John Mackenzie, as VI. of Applecross. He obtained that estate from his maternal uncle, John, V. of Applecross.
In 1781 he sold Highfield to George Gillanders, commissioner for Seaforth, and purchased Lochcarron from Sir Alexander Mackenzie of Delvine for L10,000. He married Elizabeth, daughter of Donald Mackenzie, V. of Kilcoy, with issue - John, VII. of Applecross, and several others. (For his succession see Applecross Genealogy.)