Anne Rees1 
From 1 March 1864, her married name became Lewis.
Children of Anne Rees and William Thomas Lewis, 1st Baron Merthyr
- Hon. Katharine Mary Lewis2 d. 8 Feb 1950
- Hon. Annie Lucy Lewis2 d. 9 Sep 1951
- Hon. Lilian Tydfil Lewis2 d. 15 Jun 1964
- Hon. Gwendolen Halliburton Lewis2 d. 1 Jan 1944
- Hon. Marie Spencer Lewis2 d. 29 Aug 1951
- Hon. Margaret Menelaus Lewis2 d. 27 Jul 1949
- Herbert Clark Lewis, 2nd Baron Merthyr+2 b. 3 Jul 1866, d. 20 Mar 1932
- Hon. Trevor Gwyn Elliot Lewis2 b. 4 Jan 1871, d. 19 Apr 1921
Herbert Clark Lewis, 2nd Baron Merthyr1 
He was educated at Clifton College, Clifton, Bristol, England.1 He was a civil and mining engineer.1 He held the office of Deputy Lieutenant (D.L.) of Pembrokeshire.1 He held the office of Justice of the Peace (J.P.) for Pembrokeshire.1 He held the office of High Sheriff of Pembrokeshire in 1907.1 He held the office of High Sheriff of Radnorshire in 1914.1 He succeeded as the 2nd Baron Merthyr, of Senghenydd, co. Glamorgan [U.K., 1911] on 27 August 1914.1 He succeeded as the 2nd Baronet Lewis [U.K., 1896] on 27 August 1914.1
Children of Herbert Clark Lewis, 2nd Baron Merthyr and Elizabeth Anna Couchman
- William Brereton Couchman Lewis, 3rd Baron Merthyr+2 b. 7 Jan 1901, d. 5 Apr 1977
- Hon. Anne Elizabeth Mary Llewelyn Lewis+2 b. 17 Apr 1902, d. 7 Feb 1963
Hon. Trevor Gwyn Elliot Lewis1 
He graduated from Trinity College, Cambridge University, Cambridge, Cambridgeshire, England, in 1891 with a Master of Arts (M.A.)1 He was a practising barrister.1
Sara Winston Scales1 
From 21 November 1903, her married name became Lewis.
- [S37] BP2003 volume 2, page 2670. See link for full details for this source. Hereinafter cited as. [S37]
Hon. Katharine Mary Lewis1 
From 18 January 1899, her married name became Green.
Most Reverend Charles Alfred Howell Green1 
He held the office of Archbishop of Wales.1 He held the office of Bishop of Bangor.1 He graduated with a Doctor of Divinity (D.D.)1 He graduated with a Doctor of Civil Law (D.C.L.)1
- [S37] BP2003 volume 2, page 2670. See link for full details for this source. Hereinafter cited as. [S37]
Hon. Annie Lucy Lewis1 
Hon. Lilian Tydfil Lewis1 
Hon. Gwendolen Halliburton Lewis1 