The name Jolyon means Youthful, Downy and is of English origin. Jolyon is a name that's been used primarily by parents who are considering baby names for boys.
Respelling of the name Julian.
Character in the novel (and British TV show) "The Forsyte Saga" by John Galsworthy. Jolyon Wagg, character from The Adventures of Tintin comic books. Jolyon Palmer, former Formula One driver and television commentator.