Gregory Mapes1
Child of Gregory Mapes
- [S1122] Peerage News, online http://peeragenews.blogspot.co.nz/. Hereinafter cited as Peerage News.
Hon. Edith Laura St. John1 
From 4 December 1902, her married name became Lawson Johnston.1 She was awarded the Order of Mercy with bar.2 After her marriage, Hon. Edith Laura St. John was styled as Baroness Luke on 9 July 1929.
Children of Hon. Edith Laura St. John and George Lawson Johnston, 1st Baron Luke
- Hon. Charlotte Enid Lawson Johnston+1
- Hon. Olive Elizabeth Helen Lawson Johnston1 b. 22 Jan 1904
- Ian St. John Lawson Johnston, 2nd Baron Luke+1 b. 7 Jun 1905, d. 25 May 1996
- Hon. Margaret Beaufort Lawson Johnston+1 b. 1907
- Hon. Hugh de Beauchamp Lawson Johnston+1 b. 7 Apr 1914, d. 12 Oct 2002
- Hon. Laura Pearl Lawson Johnston1 b. 1916, d. 10 Aug 2008
Hon. Laura Pearl Lawson Johnston1 
Hon. Laura Pearl Lawson Johnston usually went by her middle name of Pearl.1 She held the office of Justice of the Peace (J.P.) for Bedfordshire in 1941.1 She was appointed Officer, Order of the British Empire (O.B.E.)1 She held the office of Deputy Lieutenant (D.L.) of Bedfordshire in 1976.1 She held the office of High Sheriff of Bedfordshire between 1985 and 1986.1
- [S37] BP2003 volume 2, page 2430. See link for full details for this source. Hereinafter cited as. [S37]
- [S1122] Peerage News, online http://peeragenews.blogspot.co.nz/. Hereinafter cited as Peerage News.
Hon. Hugh de Beauchamp Lawson Johnston1 
He was educated at Eton College, Windsor, Berkshire, England.1 He graduated from Corpus Christi College, Oxford University, Oxford, Oxfordshire, England, in 1934 with a Bachelor of Arts (B.A.)1 He graduated from Corpus Christi College, Oxford University, Oxford, Oxfordshire, England, in 1938 with a Master of Arts (M.A.)1 He gained the rank of Captain in the 5th Battalion, Bedfordshire and Herefordshire Regiment (TA.)1 He was awarded the Territorial Decoration (T.D.) in 1951.1 He held the office of High Sheriff of Bedfordshire between 1961 and 1962.1 He held the office of Deputy Lieutenant (D.L.) of Bedfordshire in 1964.1 He was director of Bovril Ltd.1
Children of Hon. Hugh de Beauchamp Lawson Johnston and Audrey Warren Pearl
- Primrose Pearl Lawson Johnston+1 b. 2 Apr 1948
- Juliet Amy Lawson Johnston+1 b. 23 Jun 1950
- Marguerite Laura Lawson Johnston+1 b. 5 Jul 1952
- [S37] BP2003 volume 2, page 2430. See link for full details for this source. Hereinafter cited as. [S37]
Audrey Warren Pearl1 
On 7 May 1915 she survivied the sinking of R.M.S. Lusitania.2 From 18 July 1946, her married name became Lawson Johnston.1
Children of Audrey Warren Pearl and Hon. Hugh de Beauchamp Lawson Johnston
- Primrose Pearl Lawson Johnston+1 b. 2 Apr 1948
- Juliet Amy Lawson Johnston+1 b. 23 Jun 1950
- Marguerite Laura Lawson Johnston+1 b. 5 Jul 1952
- [S37] BP2003 volume 2, page 2430. See link for full details for this source. Hereinafter cited as. [S37]
- [S1122] Peerage News, online http://peeragenews.blogspot.co.nz/. Hereinafter cited as Peerage News.
Colonel Frederic Warren Pearl1 
Child of Colonel Frederic Warren Pearl
- Audrey Warren Pearl+1 b. 5 Feb 1915, d. 11 Jan 2011
- [S37] BP2003 volume 2, page 2430. See link for full details for this source. Hereinafter cited as. [S37]
Thomas Hamilton1 
Elizabeth Hamilton1
Her married name became Livingstone.2
Anne Hamilton1
Her married name became Craigie.2
Mary Hamilton1
- [S37] BP2003 volume 1, page 326. See link for full details for this source. Hereinafter cited as. [S37]