Lieutenant-General Dudley Charles FitzGerald-de Ros, 23rd Baron de Ros of Helmsley, KP, KCVO, DL (11 March 1827 – 29 April 1907) was a soldier, courtier and the premier Baron of England.

[1] He was the son of William FitzGerald-de Ros and Lady Georgiana Lennox.

Lord de Ros was appointed a Knight of the Order of St Patrick (KP) in the 1902 Coronation Honours list published on 26 June 1902,[8] and was invested by the Lord Lieutenant of Ireland, Earl Cadogan, at Dublin Castle on 11 August 1902.

[11] He was a member of the Amateur Photographic Association from at least 1862 to 1869 and elected a Vice President in 1862.

[13] He married firstly to Lady Elizabeth Egerton (5 July 1832 – 14 March 1892), daughter of Thomas Egerton, 2nd Earl of Wilton, in Heaton, Lancashire, on 12 October 1853, then to Mary Geraldine Mahon (died 28 December 1921), daughter of Sir William Mahon, 4th Baronet, in London on 14 January 1896.