Captain Charles Marcus Ross Elmhirst1
He gained the rank of Captain in the Scots Guards.1
Thomas William Lewis1 
He lived at Merthyr Tydfil, Glamorgan, Wales.1 He lived at Cwm Taf, Vaynor, Breconshire, Wales.1
Child of Thomas William Lewis and Gwenllian Llywelyn
- William Thomas Lewis+2 b. 1792, d. Dec 1836
Gwenllian Llywelyn1 
From 19 December 1789, her married name became Lewis.
Child of Gwenllian Llywelyn and Thomas William Lewis
- William Thomas Lewis+2 b. 1792, d. Dec 1836
William Thomas Lewis1 
He lived at Merthyr Tydfil, Glamorgan, Wales.1
Child of William Thomas Lewis and Margaret Thomas
- Thomas William Lewis+2 b. 20 Mar 1818, d. 7 Feb 1900
John Thomas1
Child of John Thomas
- Margaret Thomas+2 d. 6 Feb 1854
Margaret Thomas1 
From 22 April 1817, her married name became Lewis. She lived at The Wern, Llanybyther, Carmarthenshire, Wales.1
Child of Margaret Thomas and William Thomas Lewis
- Thomas William Lewis+2 b. 20 Mar 1818, d. 7 Feb 1900
Thomas William Lewis1 
He was (an unknown value) at Abercanaid House, Merthyr Tydfil, Glamorgan, Wales.1
Child of Thomas William Lewis and Mary Anne John
- William Thomas Lewis, 1st Baron Merthyr+2 b. 5 Aug 1837, d. 27 Aug 1914
Watkin John1
Child of Watkin John
- Mary Anne John+2 d. 18 May 1887
Mary Anne John1 
Her married name became Lewis.
Child of Mary Anne John and Thomas William Lewis
- William Thomas Lewis, 1st Baron Merthyr+2 b. 5 Aug 1837, d. 27 Aug 1914
William Thomas Lewis, 1st Baron Merthyr1 
He held the office of Justice of the Peace (J.P.) for Pembrokeshire.1 He held the office of Justice of the Peace (J.P.) for Brecon.1 He held the office of Justice of the Peace (J.P.) for Glamorgan.1 He held the office of High Sheriff of Breconshire in 1884.1 He was appointed Knight of Grace, Most Venerable Order of the Hospital of St. John of Jerusalem (K.G.St.J.)1 He was appointed Knight on 16 December 1885.1 He held the office of Deputy Lieutenant (D.L.) of Glamorgan.1 He was vice-president of the Iron and Steel Institute.1 He was president of the Institute of Mining Engineers.1 He was created 1st Baronet Lewis [U.K.] on 15 February 1896.1 He held the office of Justice of the Peace (J.P.) for Monmouthshire.1 He was appointed Knight Grand Cross, Royal Victorian Order (G.C.V.O.)1 He was created 1st Baron Merthyr, of Senghenydd, co. Glamorgan [U.K.] on 24 June 1911.1
Children of William Thomas Lewis, 1st Baron Merthyr and Anne Rees
- 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