Charles Thornton Leask1 
He fought in the First World War.1 He gained the rank of officer in the Argyll & Sutherland Highlanders.1
Children of Charles Thornton Leask and Catherine Jane Leslie Leask
- Annie Leask1
- Alice Leask1
- Florence Leask1
- Ailsa Leask2 b. 1909, d. 1967
- Graham Leask2 b. 20 Apr 1911, d. 1979
- Charles Keith Leask+2 b. 30 Mar 1916, d. 25 Aug 1981
Henry Leask1
Child of Henry Leask and Anne Leslie
Catherine Jane Leslie Leask1
Children of Catherine Jane Leslie Leask and Charles Thornton Leask
- Annie Leask1
- Alice Leask1
- Florence Leask1
- Ailsa Leask2 b. 1909, d. 1967
- Graham Leask2 b. 20 Apr 1911, d. 1979
- Charles Keith Leask+2 b. 30 Mar 1916, d. 25 Aug 1981
Graham Leask1 
He was an assistant master at Charterhouse School, Godalming, Surrey, England.1
Charles Keith Leask1 
Children of Charles Keith Leask and Joyce Temple
Joyce Temple1
Her married name became Leask.
Children of Joyce Temple and Charles Keith Leask
Ailsa Leask1 
From 1941, her married name became Lynch.
Reverend Donald MacLeod Lynch1
- [S37] BP2003 volume 2, page 2272. See link for full details for this source. Hereinafter cited as. [S37]
Alexander Graham Leask of that Ilk1 
On 15 May 1968 he was recognised by Lord Lyon as Leask of that Ilk and so matric arms at Lyons Office, but resigned the chiefship to Madam Anne Leask of Leask, for her life, with reversion to his heirs.2
Children of Alexander Graham Leask of that Ilk and Janet Rutherford
- Mary Elizabeth Leask2 b. 1918
- James William Graham Leask of that Ilk, younger+2 b. 16 Feb 1920, d. 24 Jan 2002
- Florence Leask2 b. 1922
- Jean Leask2 b. 1924
- Angela Leask2 b. 1949
