Kenneth Oig, his son by the divorced wife, was chief in 1493. Two years afterwards, he and Farquhar Mackintosh were imprisoned by James V. in the castle of Edinburgh. In 1497, Ross and Mackintosh made their escape, but on their way to the Highlands they were treacherously seized at the Torwood, by the laird of Buchanan. Kenneth Oig resisted and was slain, and his head presented to the king by Buchanan.

Kenneth Oig having no issue, was succeeded by his brother, John, whose mother, Agnes Fraser, was a daughter of Lord Lovat. She had other sons, from whom sprung numerous branches of this wide-spread family. As he was very young, his kinsman, Hector Roy Mackenzie, progenitor of the house of Gairloch, assumed the command of the clan, as guardian of the young chief. “Under his rule,” says Mr Gregory,[217] “the clan Kenzie became involved in feuds with the Munroes and other clans; and Hector Roy himself became obnoxious to government, as a disturber of the public peace. His intentions towards the young Lord of Kintail were considered very dubious; and the apprehensions of the latter and his friends having been roused, Hector was compelled by law to yield up the estate and the command of the tribe to the proper heir.” John, at the call of James IV., marched with his clan to the fatal field of Flodden, where he was taken prisoner by the English.

On King James the Fifth’s expedition to the Isles in 1540, he was joined at Kintail by John, chief of the Mackenzies, who accompanied him throughout his voyage. He fought at the battle of Pinkie at the head of his clan in 1547. On his death in 1556, he was succeeded by his son, Kenneth, who, by a daughter of the Earl of Athole, had Colin and Roderick, the latter ancestor of the Mackenzies of Redcastle, Kincraig, Rosend, and other branches.

Colin, eleventh chief, son of Kenneth, fought on the side of Queen Mary at the battle of Langside. He was twice married. By his first wife, Barbara, a daughter of Grant of Grant, he had, with three daughters, four sons, namely, Kenneth, his successor; Sir Roderick Mackenzie of Tarbat, ancestor of the Earls of Cromarty; Colin, ancestor of the Mackenzies of Kennock and Pitlundie; and Alexander, of the Mackenzies of Kilcoy, and other families of the name. By a second wife, Mary, eldest daughter of Roderick Mackenzie of Davoch-maluak, he had a son, Alexander, from whom the Mackenzies of Applecross, Coul, Delvin, Assint, and other families are sprung.

Kenneth, the eldest son, twelfth chief of the Mackenzies, soon after succeeding his father, was engaged in supporting the claims of Torquil Macleod, surnamed Connanach, the disinherited son of Macleod of Lewis, whose mother was the sister of John Mackenzie of Kintail, and whose daughter had married Roderick Mackenzie, Kenneth’s brother. The barony of Lewis he conveyed by writings to the Mackenzie chief, who caused the usurper thereof and some of his followers to be beheaded in July 1597. In the following year he joined Macleod of Harris and Macdonald of Sleat in opposing the project of James VI. for the colonization of the Lewis, by some Lowland gentlemen, chiefly belonging to Fife.

In 1601, Neill Macleod deserted the cause of the colonists, and Mackenzie, who had detained in captivity for several years Tormod, the only surviving legitimate son of Ruari Macleod of the Lewis, set him at liberty, and sent him into that island to assist Neill in opposing the settlers. In 1602, the feud between the Mackenzies and the Glengarry Macdonalds, regarding their lands in Wester Ross, was renewed with great violence. Ultimately, after much bloodshed on both sides, an agreement was entered into, by which Glengarry renounced in favour of Mackenzie the castle of Strone, with the lands of Lochalsh, Lochcarron, and others, so long the subject of dispute between them. A crown charter of these lands was granted to Kenneth Mackenzie in 1607. The territories of the clan Kenzie at this time were very extensive. “All the Highlands and Isles, from Ardnamurchan to Strathnaver, were either the Mackenzies’ property, or under their vassalage, some few excepted,” and all about them were bound to them “by very strict bonds of friendship.” The same year, Kenneth Mackenzie obtained, through the influence of the lord-chancellor, a gift, under the great seal, of the Lewis to himself, in virtue of the resignation formerly made in his favour by Torquil Macleod; but on the complaint to the king of those of the colonists who survived, he was forced to resign it. He was created a peer, by the title of Lord Mackenzie of Kintail, by patent, dated 19th November 1609. On the abandonment of the scheme for colonising the Lewis, the remaining adventurers, Sir George Hay and Sir James Spens, were easily prevailed upon to sell their title to Lord Kintail, who likewise succeeded in obtaining from the king a grant of the share in the island forfeited by Lord Balmerino, another of the grantees. Having thus at length acquired a legal right to the Lewis, he procured from the government a commission of fire and sword against the Islanders, and landing there with a large force, he speedily reduced them to obedience, with the exception of Neil Macleod and a few others, his kinsmen and followers. The struggle for the Lewis between the Mackenzies and the Macleods continued some time longer; an account of it has been already given. The Mackenzies ultimately succeeded in obtaining possession of the island.

Lord Kintail died in March 1611. He had married, first, Anne, daughter of George Ross of Balnagowan, and had, with two daughters, two sons, Colin, second Lord Kintail, and first Earl of Seaforth, and the Hon. John Mackenzie of Lochslin. His second wife was Isabel, daughter of Sir Alexander Ogilvie of Powrie, by whom, with a daughter, Sybilla, Mrs Macleod of Macleod, he had four sons, viz., Alexander; George, second Earl of Seaforth; Thomas of Pluscardine; and Simon of Lochslin, whose eldest son was the celebrated Sir George Mackenzie of Rosehaugh, lord advocate in the reigns of Charles II. and James VII.

Sir George Mackenzie of Rosehaugh.
From a painting by
Sir Godfrey Kneller.