Argyll, Archibald Campbell, 3d duke of, 1682–1761, Scottish nobleman; brother of the 2d duke. As lord high treasurer of Scotland (1705) and a commissioner for the union (1706), he helped negotiate the union (1707) of the kingdoms of Scotland and England. He had been created earl of Islay in 1705, and he sat as a Scottish representative peer in the united Parliament from 1707 until his death. Consistently loyal to the Hanoverian kings, he held high offices in Scotland and promoted the trade, industry, and schools of his native land. He succeeded his brother as duke in 1743.
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