Petty-Fitzmaurice is an Irish surname. It is uncommon as a given name. People with the name Petty-Fitzmaurice include:
Charles Petty-Fitzmaurice, 7th Marquess of Lansdowne (1917–1944), peer of Great BritainCharles Petty-Fitzmaurice, 9th Marquess of Lansdowne (born 1941), British peerLord Charles Petty-FitzMaurice (1874–1914), British soldier and courtierEmily Petty-Fitzmaurice, Marchioness of Lansdowne (1819–1895), British peerGeorge Petty-Fitzmaurice, 8th Marquess of Lansdowne (1912–1997), British peerGeorgina Elizabeth Petty-Fitzmaurice (born 1950), Scottish nobilityHenry Petty-Fitzmaurice, 3rd Marquess of Lansdowne (1780–1863), Irish peerHenry Petty-Fitzmaurice, 4th Marquess of Lansdowne (1816–1866), British politicianHenry Petty-Fitzmaurice, 5th Marquess of Lansdowne (1845–1927), British politician and Irish peerHenry Petty-Fitzmaurice, 6th Marquess of Lansdowne (1872–1936), Earl of KerryMaud Petty-FitzMaurice, Marchioness of Lansdowne (1850–1932), British courtier