From Darryl Lundy's Peerage page on Agnes Drummond:

http://thepeerage.com/p2151.htm#i21501

Agnes Drummond [1]

• F, #21501,
• d. 21 January 1589/90
• Last Edited=29 Apr 2008

Agnes Drummond married, firstly, Sir Hugh Campbell before 1562.[3]

She married, secondly, Hugh Montgomerie, 3rd Earl of Eglinton, son of Hugh Montgomerie, 2nd Earl of Eglinton and Mariot Seton, before 10 August 1562.[3]

She married, thirdly, Patrick Drummond, 3rd Lord Drummond, son of David Drummond, 2nd Lord Drummond and Lilias Ruthven, in 1588.[1]

She died on 21 January 1589/90.[1]

She was the daughter of Sir John Drummond of Innerpeffray and Margaret Stewart.[2]

• From before 1562, her married name became Campbell.[3]
• From before 10 August 1562, her married name became Montgomerie.[2] As a result of her marriage, Agnes Drummond was styled as Countess of Eglinton.
• From 1588, her married name became Drummond.[3]

Children of Agnes Drummond and Hugh Montgomerie, 3rd Earl of Eglinton

• 1. Lady Margaret Montgomerie+4 d. 9 Apr 1624
• 2. Lady Agnes Montgomerie+2 d. b 28 Nov 1601
• 3. Hugh Montgomerie, 4th Earl of Eglinton+3 b. 1563, d. bt 18 Apr 1586 - 20 Apr 1586
• 4. Robert Montgomerie+ b. b 1574, d. Aug 1596

Citations

• 1. [S6] G.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester, U.K.: Alan Sutton Publishing, 2000), volume IV, page 471. Hereinafter cited as The Complete Peerage.
• 2. [S6] Cokayne, and others, The Complete Peerage, volume XI, page 624.
• 3. [S37] Charles Mosley, editor, Burke's Peerage, Baronetage & Knightage, 107th edition, 3 volumes (Wilmington, Delaware, U.S.A.: Burke's Peerage (Genealogical Books) Ltd, 2003), volume 1, page 1279. Hereinafter cited as Burke's Peerage and Baronetage, 107th edition.
• 4. [S37] Charles Mosley, Burke's Peerage and Baronetage, 107th edition, volume 1, page 1280.