Kleanthis is both a Greek masculine given name and surname. Notable people with the name include: Given name Kleanthis Bargkas (born 1978), Greek cyclist Kleanthis Ierissiotis (born 1953), Greek hammer thrower Kleanthis Palaiologos (1902–1990), Greek coach and author Kleanthis Triantafyllos (1850–1889), Greek writer Kleanthis Vikelidis (1915–1998), Greek footballer Surname Stamatios Kleanthis (1802–1862), Greek architect