Mary Augusta Eustace1 
Monica Alica Eustace1 
From 16 July 1903, her married name became Eustace.
Children of Monica Alica Eustace and Lt.-Col. Henry Montague Eustace
- John Rowland Eustace2 b. 29 Aug 1904
- Myra Caroline Henrietta Eustace+2 b. 7 Aug 1905, d. 1990
- Robert Brooke Bridges Eustace2 b. 6 Feb 1907
- Lt.-Col. Gerard Henry Eustace+2 b. 20 Feb 1909, d. 26 Mar 1973
Lorna S. (?)1
Her married name became Bell.1 Her married name became Wheeler.1
Child of Lorna S. (?) and Captain G. T. Wheeler
- [S47] BIFR1976 page 389. See link for full details for this source. Hereinafter cited as. [S47]
Henrietta Mildred Eustace1 
From June 1900, her married name became Jones.
Rev. Canon Enoch Jones1
- [S47] BIFR1976 page 390. See link for full details for this source. Hereinafter cited as. [S47]
Reverend Robert Henry Eustace1 
He was the Rector at Sampford, Essex, EnglandG.1 He lived at Sampford Grange, Essex, EnglandG.1
Children of Reverend Robert Henry Eustace and Emily Louisa Bridges
- Gerard John Eustace2
- Lt.-Col. Henry Montague Eustace+2 b. 28 Nov 1863, d. 27 Feb 1926
- Louis Charles Moss Eustace+2 b. 4 Feb 1865, d. 17 Dec 1939
Robin Christopher Moore1
- [S37] BP2003 volume 1, page 1361. See link for full details for this source. Hereinafter cited as. [S37]
Emily Louisa Bridges1 
From 23 August 1859, her married name became Eustace.
Children of Emily Louisa Bridges and Reverend Robert Henry Eustace
- Gerard John Eustace2
- Lt.-Col. Henry Montague Eustace+2 b. 28 Nov 1863, d. 27 Feb 1926
- Louis Charles Moss Eustace+2 b. 4 Feb 1865, d. 17 Dec 1939
Gerard John Eustace1 
Lt.-Col. Henry Montague Eustace1 
He was educated at Harrow School, Harrow, London, EnglandG.1 He was educated at Royal Military College, Sandhurst, Berkshire, EnglandG.1 He fought in the Boer War between 1899 and 1902.1 He was awarded the Distinguished Service Order (D.S.O.) in 1901.1 He fought in the First World War, where he was wounded.1 He gained the rank of Lieutenant-Colonel in the 6th Battalion, York and Lancaster Regiment.1 He held the office of Justice of the Peace (J.P.)1 He lived at Munfin House, Ballycarney, County Wexford, IrelandG.1
Children of Lt.-Col. Henry Montague Eustace and Monica Alica Eustace
- John Rowland Eustace2 b. 29 Aug 1904
- Myra Caroline Henrietta Eustace+2 b. 7 Aug 1905, d. 1990
- Robert Brooke Bridges Eustace2 b. 6 Feb 1907
- Lt.-Col. Gerard Henry Eustace+2 b. 20 Feb 1909, d. 26 Mar 1973