Hilarion is a male form of a Latin-derived name, related to the name Hilary which in modern times is mainly feminine.
People with the given name Hilarion the Great (291–371), anchorite Hilarion the Younger (8th/9th century), Byzantine abbot Hilarion the Iberian (born ), Georgian monk Hilarion Alfeyev (born 1966), Russian Orthodox bishop, church historian, and composer Hilarión Daza (1840–1894), President of Bolivia from 1876–1879 Hilarion of Kiev (11th century), Russian Orthodox bishop Hilarion-Pit Lessard (1913–1984), Canadian politician Hilarion (Prikhodko) (1924–2008), Russian Orthodox priest in Novgorod Hilarion Vendégou (1941–2020), high chief of the Isle of Pines in New Caledonia Master Hilarion, an Ascended Master in Theosophy Metropolitan Ilarion or Hilarion, various Eastern Orthodox bishops Anne-Hilarion de Cotentin de Tourville (1642–1701), French naval commander
People with the surname Auguste Hilarion, comte de Kératry (1769–1859), French poet, novelist, short story writer, literary critic, historian, and politician
Other people Hilarion, magical name of Marjorie Cameron Sister Hilarion, magical name of Jeanne Robert Foster
Fictional characters Prince Hilarion, one of the protagonists in the Gilbert & Sullivan comic opera Princess Ida Hilarion (Giselle), a gamekeeper in Adolphe Adam's romantic ballet
See also Saint-Hilarion, a commune in France Ilarion, a variant of the name