Dion may refer to: People: Dion Cassius, Roman historian. Dion Fortune, British Occultist Dion of Syracuse (408–354 BC), ancient Greek politician Dion DiMucci (b. 1939), an American singer/songwriter who's known professionally as "Dion" Dion of Naples, an ancient Roman mathematician cited by Augustine of Hippo along with Adrastus of Cyzicus Dion of Prusa (1st century), stoic Dion Ignacio, a Filipino actor Dion Phaneuf, a Canadian ice hockey player Dion Nash, a New Zealand cricketer… (More on Dion)