John Robert Brereton1 
He was educated at Trinity College, Dublin University, Dublin, County Dublin, IrelandG.1 He was admitted to King’s Inns entitled to practise as a Barrister-at-Law.1 He lived at Parsonstown, County Offaly, IrelandG.1
Children of John Robert Brereton and Mary O’Moore
Garrett O’Moore, The O’Moore1
Children of Garrett O’Moore, The O’Moore
- Mary O’Moore+2 d. 1871
- Grace Emily O’Moore+1
Mary O’Moore1 
Her married name became Brereton.
Children of Mary O’Moore and John Robert Brereton
Roland Herbert O’Moore Brereton1
He lived at Old Court, County Tipperary, IrelandG.1
Mary Letitia Longfield Brereton1 
From May 1874, her married name became Creagh.
Child of Mary Letitia Longfield Brereton and General Sir Garrett O’Moore Creagh, V.C.
- Maj.-Gen. Sir Michael O’Moore Creagh+ d. 14 Dec 1970
Captain James Creagh1 
He lived at Cahirbane, Newmarket-on-Fergus, County Clare, IrelandG.1 He gained the rank of Captain in the Royal Navy.1
Child of Captain James Creagh and Grace Emily O’Moore
- General Sir Garrett O’Moore Creagh, V.C.+4 d. 9 Aug 1923
- [S47] BIFR1976 page 165. See link for full details for this source. Hereinafter cited as. [S47]
- [S31] Bernard, Sir Burke, editor, Burke’s genealogical and heraldic history of the landed gentry of Ireland, 4th ed. (London, U.K.: Burkes Peerage Ltd, 1958). Hereinafter cited as Landed Gentry of Ireland.
- [S31] Bernard, Sir Burke, Landed Gentry of Ireland, page 187.
- [S47] BIFR1976. [S47]
General Sir Garrett O’Moore Creagh, V.C.1 
General Sir Garrett O’Moore Creagh, V.C. was the son of Captain James Creagh and Grace Emily O’Moore.3,1 He married Mary Letitia Longfield Brereton, daughter of John Robert Brereton and Mary O’Moore, in May 1874.1 He died on 9 August 1923.1
He was appointed Knight Grand Commander, Order of the Star of India (G.C.S.I.)1 He gained the rank of Colonel in the 129th Regiment.2 He was awarded the Victoria Cross (V.C.)1 He was appointed Knight Grand Cross, Order of the Bath (G.C.B.)1
Child of General Sir Garrett O’Moore Creagh, V.C. and Mary Letitia Longfield Brereton
- Maj.-Gen. Sir Michael O’Moore Creagh+4 d. 14 Dec 1970
Simpson Hackett Brereton1
He lived at Clongowna, County Tipperary, IrelandG.1
Children of Simpson Hackett Brereton and Mary Sophia Parker
- Maud Brereton2 d. 1921
- Sophia Brereton2 d. 1907
- Margaret Brereton2
- Georgina Brereton2
- John Parker Brereton2 b. 1850, d. 1898
- George Augustus Herbert Hacket Brereton2 b. 1862, d. 20 Apr 1920
