Admiral Arthur William Edward Prothero1 
He gained the rank of Admiral in the Royal Navy.1
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 116. Hereinafter cited as The New Extinct Peerage.
Helen Lucy Ellicombe1,2 
From 4 September 1894, her married name became Prothero.1
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 116. Hereinafter cited as The New Extinct Peerage.
- [S465] Marquis Ruvigny, Plantagenet Roll of the Blood Royal, being a complete table of all the descendants now living of Edward III, King of England: Essex Volume (Baltimore: Genealogical Publishing Company, 1907), page 252. Hereinafter cited as Plantagenet Roll of the Blood Royal: Essex.
George Bradford Ellicombe1,2
Child of George Bradford Ellicombe
- Helen Lucy Ellicombe1 d. 27 Apr 1932
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 116. Hereinafter cited as The New Extinct Peerage.
- [S465] Marquis Ruvigny, Plantagenet Roll of the Blood Royal, being a complete table of all the descendants now living of Edward III, King of England: Essex Volume (Baltimore: Genealogical Publishing Company, 1907), page 252. Hereinafter cited as Plantagenet Roll of the Blood Royal: Essex.
Rowland Edmund Prothero, 1st Baron Ernle1 
He was educated at Marlborough College, Marlborough, Wiltshire, EnglandG.3 He graduated from Balliol College, Oxford University, Oxford, Oxfordshire, EnglandG, in 1878 with a Master of Arts (M.A.)3 He was admitted to Middle Temple in 1878 entitled to practise as a Barrister-at-Law.3 He was editor of the Quarterly Review between 1894 and 1899.3 He was Agent-in-Chief to the Duke of Bedford between 1898 and 1918.3 He held the office of Member of Parliament (M.P.) for the University of Oxford between 1914 and 1919.3 He held the office of President of the Board of Agriculture and Fisheries between 1916 and 1919.3 He was created 1st Baron Ernle, of Chelsea, co. London [U.K.] on 4 February 1919.3 He wrote the book The Psalms in Human Life.3 He wrote the book English Farming Past and Present.3 On his death, his title became extinct.3
Children of Rowland Edmund Prothero, 1st Baron Ernle and Mary Beatrice Bailward
- Hon. Beatrice Hope Prothero3 b. 11 Jul 1892
- Rowland John Prothero3 b. 23 Jun 1894, d. 8 Nov 1918
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 116. Hereinafter cited as The New Extinct Peerage.
- [S4567] Bill Norton, “re: Pitman Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 6 April 2010 and 19 April 2011. Hereinafter cited as “re: Pitman Family.”
- [S21] L. G. Pine, The New Extinct Peerage, page 117.
Mary Beatrice Bailward1 
From 15 August 1891, her married name became Prothero.1
Children of Mary Beatrice Bailward and Rowland Edmund Prothero, 1st Baron Ernle
- Hon. Beatrice Hope Prothero1 b. 11 Jul 1892
- Rowland John Prothero1 b. 23 Jun 1894, d. 8 Nov 1918
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 117. Hereinafter cited as The New Extinct Peerage.
- [S4567] Bill Norton, “re: Pitman Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 6 April 2010 and 19 April 2011. Hereinafter cited as “re: Pitman Family.”
Frederick Henry Harkness1 
- [S37] BP2003 volume 2, page 2577. See link for full details for this source. Hereinafter cited as. [S37]
Barbara Jane Hamley1 
From 9 April 1902, her married name became Prothero.1 After her marriage, Barbara Jane Hamley was styled as Baroness Ernle on 4 February 1919.
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 117. Hereinafter cited as The New Extinct Peerage.
Lt.-Col. C. O. Hamley1
Child of Lt.-Col. C. O. Hamley
- Barbara Jane Hamley1 d. 26 Nov 1930
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 117. Hereinafter cited as The New Extinct Peerage.
Rowland John Prothero1

He was educated at Eton College, Windsor, Berkshire, EnglandG.1 He was educated at Royal Military College, Sandhurst, Berkshire, EnglandG.1 He was commissioned on 17 September 1913, in the service of the 7th Hussars.1 He fought in the First World War.1
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 117. Hereinafter cited as The New Extinct Peerage.
Hon. Beatrice Hope Prothero1 
From 3 February 1923, her married name became Gilpin.1
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 117. Hereinafter cited as The New Extinct Peerage.
- [S465] Marquis Ruvigny, Plantagenet Roll of the Blood Royal, being a complete table of all the descendants now living of Edward III, King of England: Essex Volume (Baltimore: Genealogical Publishing Company, 1907), page 252. Hereinafter cited as Plantagenet Roll of the Blood Royal: Essex.