List of Famous people born in Leinster, Ireland

Admiral Sir Hastings Reginald Yelverton, was a Royal Navy officer. As a junior officer he took part in a major action against pirates off Candia in June 1826 and was involved in protecting British interests during the Portuguese Civil War during the early 1830s. He saw action in the Crimean War as Captain of one of the two ships that captured a Russian barque beneath the batteries at Ekenäs in Finland in May 1854. Then in July 1873 he took part in the suppression of the Cantonal Revolution in Cartagena. He became First Naval Lord in September 1876 and in that role implemented a series of economies demanded by the Disraeli ministry but was also involved in ordering the small, cheap and thoroughly unsuccessful ironclad Ajax-class battleships.

Katherine Plunket was an Irish aristocrat from Ballymascanlan, County Louth, a prolific botanical illustrator and the oldest person ever to be born and die in Ireland, at 111 years and 327 days.

Lieutenant-Colonel Charles Kenneth Howard-Bury DSO, DL, JP was a British soldier, explorer, botanist and Conservative politician.

Richard Edward Lloyd Maunsell held the post of chief mechanical engineer (CME) of the South Eastern and Chatham Railway from 1913 until the 1923 Grouping and then the post of CME of the Southern Railway in England until 1937. He had previously worked his way up through positions in other railways in Ireland, England and India.

Admiral of the Fleet Sir John Michael de Robeck, 1st Baronet, was an officer in the Royal Navy. In the early years of the 20th century he served as Admiral of Patrols, commanding four flotillas of destroyers.

Dame Kathleen Lonsdale was an Irish pacifist, prison reformer and crystallographer. She proved, in 1929, that the benzene ring is flat by using X-ray diffraction methods to elucidate the structure of hexamethylbenzene. She was the first to use Fourier spectral methods while solving the structure of hexachlorobenzene in 1931. During her career she attained several firsts for female scientists, including being one of the first two women elected a Fellow of the Royal Society (FRS) in 1945, first woman tenured professor at University College London, first woman president of the International Union of Crystallography, and first woman president of the British Association for the Advancement of Science.

Sir George Ruthven Le Hunte was Governor of South Australia from 1 July 1903 until 18 February 1909, soon after federation of Australia.

Alan Joseph Joyce, is an Irish-Australian businessperson. He is the Chief Executive Officer (CEO) of Qantas Airways Limited.

Major General Sir George Pomeroy Colley, was a British Army officer who became Governor and Commander-in-Chief of Natal and High Commissioner for South Eastern Africa. Colley was killed in action, at the Battle of Majuba Hill.

William Pollard-Urquhart, was a 19th-century writer specialising in economic and policy questions of his day; he served as high sheriff of County Westmeath, and sat as Member of Parliament for the county.