Charles George Francis Mercer Nairne Petty-Fitzmaurice MVO (12 February 1874 – 30 October 1914) was an English soldier and courtier.
Petty-Fitzmaurice was the younger son of Henry Charles Keith Petty-Fitzmaurice and Maud Evelyn Hamilton.
He joined the 1st King's Dragoon Guards in 1895, and served as an aide-de-camp to Frederick Roberts during the Boer War 1899-1900. He stayed as a Lieutenant of the 1st Dragoon Guards until January 1901, when he was seconded for service on the army staff as Aide-de-camp to Lord Roberts, who had been appointed Commander-in-Chief of the Forces. Lord Roberts resigned when this post was abolished in early 1904, and Petty-Fitzmaurice was promoted Captain of his former regiment the 1st Dragoons in October 1904.
In May 1902, he was part of a delegation led by the Duke of Connaught to take part in the enthronement ceremonies in Madrid for the young King Alfonso XIII of Spain, and he was awarded the First class of the Spanish Order of Military Merit.
On 20 January 1909, he married Violet Mary Elliot-Murray-Kynymound (daughter of Gilbert John Elliot-Murray-Kynynmound and Mary Caroline Grey) and they had two children: