I'm big into Genealogy and the name FitzMaurice caught my eye.

Here is what I could find:

Major Lord Charles George Francis Mercer Nairne Petty-FitzMaurice1 (M)
b. 12 February 1874, d. 30 October 1914, #29047
Pedigree
Last Edited=7 Sep 2005

Major Lord Charles George Francis Mercer Nairne Petty-FitzMaurice was born on 12 February 1874.3 He was the son of Sir Henry Charles Keith Petty-FitzMaurice, 5th Marquess of Lansdowne and Lady Maud Evelyn Hamilton.2 He married Lady Violet Mary Elliot-Murray-Kynynmound, daughter of Gilbert John Elliot-Murray-Kynynmound, 4th Earl of Minto and Mary Caroline Grey, on 20 January 1909.4 He died on 30 October 1914 at age 40 in Ypres, Belgium, killed in action.2,5
Major Lord Charles George Francis Mercer Nairne Petty-FitzMaurice was baptised with the name of Charles George Francis Petty-FitzMaurice.6 He was Aide-de-Camp to Field Marshal Earl Roberts between 1899 and 1900.3 He fought in the Boer War between 1899 and 1900.3 He held the office of Equerry in Ordinary between 1909 and 1910, to the Prince of Wales, later HM King George V.3 He was invested as a Member, Royal Victorian Order (M.V.O.).1 He held the office of Equerry between 1910 and 1914, to HM King George V.3 He lived in Aldie, Kinross-shire, Scotland.3 He lived in Meiklour, Perthshire, Scotland.3 He lived in Tullybeagles, Perthshire, Scotland.3 He gained the rank of Major in the service of the 1st Dragoons.2 On 1 January 1914 his name was legally changed to Charles George Francis Mercer Nairne Petty-FitzMaurice.3

Children of Major Lord Charles George Francis Mercer Nairne Petty-FitzMaurice and Lady Violet Mary Elliot-Murray-Kynynmound
Lady Mary Margaret Elizabeth Petty-FitzMaurice+ b. 6 Feb 1910, d. 4 Mar 2003
George John Charles Mercer Nairne Petty-FitzMaurice, 8th Marquess of Lansdowne+ b. 27 Nov 1912, d. 25 Aug 1999

Sources:

Citations

[S8] Charles Mosley, editor, Burke's Peerage and Baronetage, 106th edition, 2 volumes (Crans, Switzerland: Burke's Peerage (Genealogical Books) Ltd, 1999), volume 1, page 132. Hereinafter cited as Burke's Peerage and Baronetage, 106th edition.
[S6] G.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester, U.K.: Alan Sutton Publishing, 2000), volume VII, page 443. Hereinafter cited as The Complete Peerage.
[S37] Charles Mosley, editor, Burke's Peerage, Baronetage & Knightage, 107th edition, 3 volumes (Wilmington, Delaware, U.S.A.: Burke's Peerage (Genealogical Books) Ltd, 2003), volume 2, page 2240. Hereinafter cited as Burke's Peerage and Baronetage, 107th edition.
[S2] Peter W. Hammond, editor, The Complete Peerage or a History of the House of Lords and All its Members From the Earliest Times, Volume XIV: Addenda & Corrigenda (Stroud, Gloucestershire, U.K.: Sutton Publishing, 1998), page 817. Hereinafter cited as The Complete Peerage, Volume XIV.
[S1444] Letter from Jim FitzMaurice (22 Bell Road, Lower Hutt, New Zealand) to Darryl Lundy, 18 August 2005; unknown repository (unknown repository address).
[S2] Peter W. Hammond, The Complete Peerage, Volume XIV, page 424.