Major Pierce O’Brien Butler1 
He gained the rank of Ensign in 1858 in the 3rd West India Regiment.1 He fought in the China War in 1860, with King’s Royal Rifle Corps.1 He retired from the military in 1878, with the rank of Major.1
Children of Major Pierce O’Brien Butler and Marcella Hynes
- Pierce Edmond O’Brien Butler1 b. 12 Jan 1877, d. 15 Jan 1902
- William Dunboyne O’Brien Butler1 b. c 1878, d. 11 Jan 1884
- Charles Paget O’Brien Butler+1 b. 18 Jul 1881, d. 1 Nov 1914
- James Eustace O’Brien Butler1 b. c 1883, d. 31 Jul 1887
- Capel Desmond O’Brien Butler1 b. 1889, d. 7 Jun 1917
- [S372] Lord Dunboyne, “The Family of O’Brien Butler (1763-1954)”, The Irish Genealogist . Hereinafter cited as “The Family of O’Brien Butler.”
Marcella Hynes1
From 13 September 1875, her married name became O’Brien Butler.1
Children of Marcella Hynes and Major Pierce O’Brien Butler
- Pierce Edmond O’Brien Butler1 b. 12 Jan 1877, d. 15 Jan 1902
- William Dunboyne O’Brien Butler1 b. c 1878, d. 11 Jan 1884
- Charles Paget O’Brien Butler+1 b. 18 Jul 1881, d. 1 Nov 1914
- James Eustace O’Brien Butler1 b. c 1883, d. 31 Jul 1887
- Capel Desmond O’Brien Butler1 b. 1889, d. 7 Jun 1917
- [S372] Lord Dunboyne, “The Family of O’Brien Butler (1763-1954)”, The Irish Genealogist . Hereinafter cited as “The Family of O’Brien Butler.”
James Hynes1
Child of James Hynes
- [S372] Lord Dunboyne, “The Family of O’Brien Butler (1763-1954)”, The Irish Genealogist . Hereinafter cited as “The Family of O’Brien Butler.”
Edmund O’Brien Butler1
- [S372] Lord Dunboyne, “The Family of O’Brien Butler (1763-1954)”, The Irish Genealogist . Hereinafter cited as “The Family of O’Brien Butler.”
William O’Brien Butler1 
- [S372] Lord Dunboyne, “The Family of O’Brien Butler (1763-1954)”, The Irish Genealogist . Hereinafter cited as “The Family of O’Brien Butler.”
John O’Brien Butler1
- [S372] Lord Dunboyne, “The Family of O’Brien Butler (1763-1954)”, The Irish Genealogist . Hereinafter cited as “The Family of O’Brien Butler.”
Murrough O’Brien Butler1
He emigrated to U.S.A.G.1 He was also known as Murrough Butler.1 He was living in 1859.1
- [S372] Lord Dunboyne, “The Family of O’Brien Butler (1763-1954)”, The Irish Genealogist . Hereinafter cited as “The Family of O’Brien Butler.”
Ida Mary O’Brien Butler1 
From 3 May 1921, her married name became Heitzelman.1
- [S372] Lord Dunboyne, “The Family of O’Brien Butler (1763-1954)”, The Irish Genealogist . Hereinafter cited as “The Family of O’Brien Butler.”
Percival Stewart Heitzelman1
He was U.S. Consul-General to Winnipeg.1
- [S372] Lord Dunboyne, “The Family of O’Brien Butler (1763-1954)”, The Irish Genealogist . Hereinafter cited as “The Family of O’Brien Butler.”
Millicent Aurelia O’Brien Butler1 
From 23 April 1923, her married name became Wemyss.1
Child of Millicent Aurelia O’Brien Butler and George Alexander Finniss Wemyss
- Frances Mary Wemyss2 b. 1924, d. 2003
- [S372] Lord Dunboyne, “The Family of O’Brien Butler (1763-1954)”, The Irish Genealogist . Hereinafter cited as “The Family of O’Brien Butler.”
- [S7177] Bob Janes, “re: Bosanquet Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 June 2014. Hereinafter cited as “re: Bosanquet Family.”
