ANTRIM, RANDAL MACDONNELL, 1ST MARQUESS OF (1609-1683), son of the 1st Earl of Antrim, was born in 1609 and educated as a Roman Catholic. He married the widow of the 1st Duke of Buckingham. On the outbreak of the Scottish war, in 1639, he made a scheme to attack Argyll in Scotland, which came to nothing. From that time onwards he was engaged in various schemes for the assistance of Charles I. against the parlia ment—all of them abortive. He was at various times arrested as a suspect. The papers found on him at his capture in 1643 in formed the parliamentary leaders of a plan for a rising by Mon trose in Scotland to be supported from Ireland. On Jan. 26, Antrim was created a marquess. He was employed on various missions in Ireland and on the Continent until 1647, when he ceased to support the king's cause. In 1649 he entered into com munications with Cromwell, for whom he performed various services, though there appears no authority to support Carte's story that Antrim was the author of a forged agreement for the be trayal of the king's army by Lord Inchiquin. Subsequently he joined Ireton and was present at the siege of Carlow. He returned to England in Dec. 165o, and in lieu of his confiscated estate received a pension of iSoo and later of fBoo, together with lands in Mayo. At the Restoration, Antrim was excluded from the Act of Oblivion on account of his religion and, on presenting himself at court, was imprisoned in the Tower, subsequently being called be fore the lords justices in Ireland. In 1663 through the influence of the queen mother he obtained a pardon, his estates being restored to him by the Irish Act of Explanation in 1665. Antrim died on Feb. 3, 1683. He is described by Clarendon as of handsome ap pearance but "of excessive pride and vanity and of a marvellous weak and narrow understanding." See Hibernia Anglicana, by R. Cox (1689-9o) esp. app. xlix. vol. ii. 206; History of the Irish Confederation, by J. T. Gilbert (1882-91) ; Aphorismical Discovery (Irish Archaeological Society, 1879-80) ; Thomason Tracts (Brit. Mus.), E 59 (i8), 149 (52), (7). (19), 61 (23) ; Murder will out, or the King's Letter justifying the Marquess of Antrim (1689) ; Hist. mss. Comm. Series mss. of Marg. of Ormonde.