William Glynne Charles Gladstone (14 July 1885 – 13 April 1915) was a Liberal Party politician in the United Kingdom, and the last of four generations of Gladstones to serve in the House of Commons, the first being his great-grandfather Sir John Gladstone(s) (1764–1851). His body was the last to be officially repatriated during World War I.
Gladstone was born on 14 July 1885. His father, William Henry Gladstone (1840–1892), was the eldest son of the Liberal Prime Minister William Ewart Gladstone and his wife Catherine, and his mother was the Hon. Gertrude Gladstone, daughter of Charles Stuart, 12th Lord Blantyre. He inherited from his father the 18th-century Hawarden Castle which had belonged to the family of his grandmother's brother Sir Stephen Glynne, the 9th and last baronet.
He was educated at home before attending Eton and then New College, Oxford. He was president of the Oxford Union in 1907 and graduated with a second class degree.
In 1909, Gladstone was the Assistant Private Secretary to John Hamilton-Gordon, Earl of Aberdeen who was serving as Lord Lieutenant of Ireland. In 1911, he served a few months at the British Embassy in Washington, D.C. as an Honorary Attaché to Lord Bryce.