Randal William MacDonnell, 1st Marquess of Antrim

Randal William MacDonnell, 1st Marquess of Antrim KB PC (Ire) (4 November 1749 – 29 July 1791) was an Irish peer.

From his parent's marriage, he had two sisters, Lady Rachel MacDonnell (who married Joseph Sanford) and Lady Elizabeth Helena MacDonnell (who married, as his third wife, Col. Sir James Campbell).

At this time Sir John Blaquiere wrote of him as "an idle, unsteady young man, not to be depended upon".

He succeeded his father as sixth Earl of Antrim on 13 October 1775 and took his seat in the Irish House of Lords on 13 March 1776.

She married Charles Vane, 3rd Marquess of Londonderry and was the mother of George Vane-Tempest, 5th Marquess of Londonderry, Lady Frances Anne Emily Vane (wife of John Spencer-Churchill, 7th Duke of Marlborough), Lady Alexandrina Octavia Maria Vane (godchild of Czar Alexander I of Russia; she married Henry Dawson-Damer, 3rd Earl of Portarlington), Lord Adolphus Vane-Tempest, and Lady Adelaide Emelina Caroline Vane (who eloped with her brother's tutor, Rev.

[6] This article incorporates text from this source, which is in the public domain: George Edward Cokayne, ed.