The Lamonts are a Celtic family. The old seat of the Chief was Castle Toward. This was changed to Ardlamont, between the Kyles of Bute and Loch Fyne, which was the seat of the Chiefs until the close of the nineteenth century. The surname of the clan is from one Lauman.
A Duncan MacLamont seems to have been Laird of Lamont in Robert III's reign. There, were also Lamonts of Inverin, the greater part of whose lands was appropriated by the Campbells. John Lamont of Lamont married Lady Jean Campbell, daughter of the Earl of Argyll who fell at Flodden.
The Lamonts fought under Montrose at Philiphaugh in 1645. Attacked by the Campbells, they bravely defended themselves in the Castle of Toward, but had to surrender, and were all put to the sword by the victors.
In 1685-86 the Laird of Lamont and Archibald Lamont of Silvercraigs were Commissioners in the Parliament at Edinburgh. There were also Lamonts of Willowfield. In course of time the estates passed to Dougal Lamont of Stilaig. His eldest daughter was married to John Lamont of Kilfinnan, and their eldest son succeeded to the estate and chiefship in right of the maternal line.

Chief: Lamont of that Ilk.
Patronymic: Mac Laomuinn.
Clan Seats: Ardlamont, Argyll; Castle Toward.
Plant: Crab Apple.
Pipe Music: Lamont's Welcome.