Caroline Maria Hayne1 
From 7 June 1887, her married name became Williamson.
Children of Caroline Maria Hayne and Archibald Williamson, 1st Baron Forres
- Stephen Kenneth Guthrie Williamson, 2nd Baron Forres+2 b. 20 Mar 1888, d. 26 Jun 1954
- Hon. Winifred Elspeth Guthrie Williamson2 b. 12 Jun 1891, d. 30 Apr 1965
- Captain Hon. Gerald Hayne Guthrie Williamson+2 b. 14 Jan 1893, d. 9 Jun 1966
Stephen Kenneth Guthrie Williamson, 2nd Baron Forres1 
He was educated at Eton College, Windsor, Berkshire, EnglandG.2 He graduated from Trinity College, Cambridge University, Cambridge, Cambridgeshire, EnglandG, with a Bachelor of Arts (B.A.)2 He fought in the First World War, where he was mentioned in despatches.2 He gained the rank of Major in the Westminster Dragoons, Territorial Army.2 He was a director of Balfour, Williamson & Company.2 He was chairman of Lobitos Oilfields.2 He succeeded as the 2nd Baron Forres, of Glenogil, co. Forfar [U.K., 1922] on 29 October 1931.2 He succeeded as the 2nd Baronet Williamson, of Glenogil, co. Forfar [U.K., 1909] on 29 October 1931.2 He was Director-General of the Office of Machinery, Board of Trade between 1942 and 1945.2
Children of Stephen Kenneth Guthrie Williamson, 2nd Baron Forres and Jessica Harford
- Hon. Jean Mary Williamson+2 b. 17 Jun 1919, d. 10 Dec 2009
- John Archibald Harford Williamson, 3rd Baron Forres+2 b. 30 Oct 1922, d. 22 Sep 1978
- Angus Stephen Williamson2 b. 19 Dec 1929
George Egerton Leigh Westbrook1 
- [S3914] Dianne Shannon, “re: Basley Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 15 August 2009. Hereinafter cited as “re: Basley Family.”
- [S474] FamilySearch, online http://www.familysearch.com. Hereinafter cited as FamilySearch.
Edmund Batten Forbes1 
Children of Edmund Batten Forbes and Charlotte Agnes Wauchope
- James Stuart Forbes2 b. 13 Feb 1888, d. 29 Apr 1935
- Christian Alice Hersey Forbes+2 b. 9 Feb 1893, d. 26 Jan 1958
- Dame Katherine Jane Trefusis Forbes2 b. 21 Mar 1899, d. 18 Jun 1971
Christian Alice Hersey Forbes1 
From 5 May 1917, her married name became Williamson. She held the office of Member of the Chelsea Borough Council.2
Children of Christian Alice Hersey Forbes and Captain Hon. Gerald Hayne Guthrie Williamson
- Alexander Fergus Forbes Williamson+2 b. 12 Mar 1919, d. 1987
- Hersey Caroline Ann Williamson+2 b. 14 Aug 1920, d. 21 Oct 2012
- David Archibald Forbes Williamson+2 b. 30 Oct 1922, d. 10 Jul 1980
- Jane Christian Forbes Williamson2 b. 11 Mar 1931, d. 26 Feb 2015
Patrick de Salisbury, 1st Earl of Salisbury1 
He gained the title of 1st Earl of Salisbury.
Child of Patrick de Salisbury, 1st Earl of Salisbury and Ela Talvas
- [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 XI, page 375. Hereinafter cited as The Complete Peerage.
- [S6] Cokayne, and others, The Complete Peerage, volume XI, page 374.
- [S6] Cokayne, and others, The Complete Peerage, volume XI, page 377.
Sybil de Chaworth1
Children of Sybil de Chaworth and Walter de Salisbury
- Sybil de Salisbury+1
- Patrick de Salisbury, 1st Earl of Salisbury+1 d. c 7 Apr 1168
- [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 XI, page 375. Hereinafter cited as The Complete Peerage.
Patrick de Chaworth1
Child of Patrick de Chaworth
- [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 XI, page 375. Hereinafter cited as The Complete Peerage.
Dr. James David Alexander Williamson1
He was educated at Gordonstoun School, Elgin, Morayshire, ScotlandG.1 He was educated at University of New Brunswick, New Brunswick, CanadaG.1 He graduated from Aberdeen University, Aberdeen, Aberdeenshire, ScotlandG, with a Bachelor of Science (B.Sc.)1 He graduated from Aberdeen University, Aberdeen, Aberdeenshire, ScotlandG, with a Doctor of Philosophy (Ph.D.)1 He lived in 2003 at Alvie, Kincraig, Kingussie, Inverness-shire, ScotlandG.1
Children of Dr. James David Alexander Williamson and Lynette Robyn Stewart
- Ruaraidh James Stewart Williamson2 b. 1978
- Joanna Mary Williamson2 b. 1980
- Catherine Ngaire Williamson2 b. 1985
