Alun ([ˈalɨ̞n]) is a Welsh variant of the masculine given name Alan. Notable people with the name include:
Ailín I, Earl of Lennox, also spelled Alún, 12th century ruler of Lennox, ScotlandAlun Anderson, Welsh journalistAlun Armstrong (disambiguation)Alun Cairns (born 1970), Welsh politicianAlun Davies (disambiguation)Alun Evans (disambiguation)Alun Francis (born 1943), Welsh conductorAlun Hoddinott (1929–2008), Welsh composer of classical musicAlun Jones (disambiguation)Alun Lewis (disambiguation)Alun Michael (born 1943), British politicianAlun Owen (1925–1994), British screenwriter best known for the screenplay of The Beatles' film A Hard Day's NightAlun Pask (1937–1995), Wales international rugby union player and captainAlun Pugh (born 1955), Welsh politicianAlun Thomas (1926–1991), rugby union player for WalesJohn Blackwell (Alun) (1797–1841), Welsh-language poet who used the bardic name Alun