Jolyon is a male given name, a medieval spelling variant of Julian, originating in England.^[1]

Notable people and characters with the name include:

• Jolyon Brettingham Smith (1949–2008), British composer
• Jolyon Connell, British journalist
• Jolyon 'Jol' Danzig, co-founder of Hamer Guitars
• Jolyon Dixon (born 1973), English guitarist
• Jolyon Howorth (born 1945), British scholar of European politics and military policy
• Jolyon Jackson (1948–1985), Irish musician and composer
• Jolyon James, Australian-born actor
• Jolyon Maugham (born 1971), British barrister
• Jolyon Palmer (born 1991), British professional racing driver
• Jolyon Petch (born 1978), New Zealand DJ and music producer
• Jolyon Ralph, founder of the mineral database mindat.org in 1993
• Jolyon Rubinstein, British actor, writer, producer and director
• Jolyon Temple, Australian children's author

• Joleon Lescott (born 1982), English footballer

• Jolyon Wagg, a character from The Adventures of Tintin comics by Hergé
• Jolyon Forsyte, two characters (known as Old Jolyon and Young Jolyon) from The Forsyte Saga series of novels (and subsequent film adaptations) by John Galsworthy
• Jolyon Till, a character from Destiny 2

• Timothy Jolyon Carter (born 1969), English cricketer
• Louis Jolyon West (1924–1999), American psychiatrist and human rights activist