David Harrington Angus Douglas, 12th Marquess of Queensberry was born on 19 December 1929.
He is the son of Francis Archibald Kelhead Douglas, 11th Marquess of Queensberry and Cathleen Sabine Mann.
He married, firstly, Ann Jones, daughter of Maurice Sinnett Jones, on 18 July 1956.
1-* He and Ann Jones were divorced in 1969.
2- He married, secondly, Alexandra Sich, daughter of Guy Wyndham Sich, on 10 July 1969. He and Alexandra Sich were divorced in 1986.
3- He married, thirdly, Hsueh-Chun Liao on 3 July 2000.
He was educated at Eton College, Windsor, Berkshire, England.1 He gained the rank of Lieutenant in the Royal Horse Guards. He succeeded as the 14th Lord Douglas of Hawick and Tibberis [S., 1628] on 27 April 1954. He succeeded as the 11th Baronet Douglas, of Kelhead [N.S., 1667] on 27 April 1954. He succeeded as the 14th Viscount of Drumlanrig [S., 1628] on 27 April 1954. He succeeded as the 12th Earl of Drumlanrig and Sanchar [S., 1681] on 27 April 1954. He succeeded as the 12th Marquess of Queensberry [S., 1681] on 27 April 1954. He succeeded as the 12th Viscount of Nith, Torthorwald and Ross [S., 1681] on 27 April 1954. He succeeded as the 14th Earl of Queensberry [S., 1633] on 27 April 1954. He succeeded as the 12th Lord Douglas of Kinmouth, Midlebie, and Dornock [S., 1681] on 27 April 1954.
Children of David Harrington Angus Douglas, 12th Marquess of Queensberry and Ann Jones
1- Lady Emma Cathleen Douglas b. 13 Sep 1956
2- Lady Alice Douglas b. 23 Jul 1965
Child of David Harrington Angus Douglas, 12th Marquess of Queensberry and Anne Carey
1- Ambrose Carey b. 14 Nov 1961
Children of David Harrington Angus Douglas, 12th Marquess of Queensberry and Alexandra Sich
1- Sholto Francis Guy Douglas, Viscount Drumlanrig b. 1 Jun 1967
2- Lady Kate Cordelia Sasha Douglas b. 21 Nov 1969
3- Lord Milo Luke Dickon Douglas b. 6 Apr 1975, d. 21 Jul 2009
4- Lord Torquil Oberon Tobias Douglas b. 2 Nov 1978
Child of David Harrington Angus Douglas, 12th Marquess of Queensberry and Hsueh-Chun Liao
1- Lady Beth Shan Ling Douglas1 b. 7 Aug 1999, d. 7 Mar 2018
