Colonel Thomas Sadleir Brereton1 
He was educated at Kilkenny College, Kilkenny, County Kilkenny, IrelandG.2 He gained the rank of Colonel in the Tipperary Artillery and Army Commissariat Department.2 He lived at Rathurles, County Tipperary, IrelandG.2
Children of Colonel Thomas Sadleir Brereton and Frances Gertrude Hardman
- Marie Brereton2 d. 23 Jan 1940
- Frances Gertrude Brereton2 d. 27 Jun 1952
- Isabella Marion Blanche Brereton2 d. 8 Nov 1944
- Eileen Augusta Hardman Brereton2 d. 21 Nov 1919
- Thomas Hardman Brereton+2 b. 23 Jan 1866, d. 23 Dec 1952
- Hardman John Ker Brereton+2 b. 1873, d. 26 May 1945
- Franc Sadleir Brereton2 b. 5 Oct 1880
Lt.-Col. John Sadleir Brereton1 
He gained the rank of Captain in 1857 in the 67th Foot.1 He was Paymaster of Belfast and Armagh.1 He gained the rank of Lieutenant-Colonel in the Army Pay Department.1 He lived at Dean’s Bridge, Armagh, County Armagh, IrelandG.1
Children of Lt.-Col. John Sadleir Brereton and Margaretta Watson Sadleir
- Myra Margaret Brereton2 d. 31 Mar 1951
- Thomas Edwin Sadleir Brereton2 b. 11 Dec 1878, d. 1957
Edwin Sadleir1 
He lived at Oakwood, County Offaly, IrelandG.1
Child of Edwin Sadleir and Jane Willington
- Margaretta Watson Sadleir+3 d. 18 Mar 1923
Margaretta Watson Sadleir1 
From 30 January 1869, her married name became Brereton.
Children of Margaretta Watson Sadleir and Lt.-Col. John Sadleir Brereton
- Myra Margaret Brereton2 d. 31 Mar 1951
- Thomas Edwin Sadleir Brereton2 b. 11 Dec 1878, d. 1957
Thomas Edwin Sadleir Brereton1 
He was educated at Royal School Armagh, Armagh, County Armagh, IrelandG.1 He lived at Dean’s Bridge, Armagh, County Armagh, IrelandG.1
James Alexander Watson1
Child of James Alexander Watson
Muriel Poyntz Watson1
From 17 June 1931, her married name became Brereton.
Myra Margaret Brereton1 
From 1901, her married name became Sadleir.
Captain Ralph Peyton Sadleir1 
He gained the rank of Captain in the Sherwood Foresters.1 He had one and one daughter.1
- [S47] BIFR1976 page 165. See link for full details for this source. Hereinafter cited as. [S47]
Franc Sadleir Brereton1 
He gained the rank of Lieutenant in the 2nd Battalion, 60th Rifles.1 He lived at Hall Hill Cottage, Oxted, Surrey, EnglandG.1
Children of Franc Sadleir Brereton and Isabella Beeston
- Thomas Bloomfield Sadleir Brereton+2 b. 1866, d. 24 Apr 1945
- Franc Sadleir Brereton2 b. 1867
- John Sadleir Brereton+2 b. 1870
- Lt.-Col. Frederick Sadleir Brereton+2 b. 5 Aug 1872, d. 12 Aug 1957
