Tadevosyan is a surname, Notable people with this surname include:
Alexander Tadevosyan (born 1980), Armenian retired footballer Arkady Ter-Tadevosyan (1939-2021), military leader Armine Tadevosyan, Armenian professional footballer Gagik Tadevosyan (1950-2024), Armenian engineer and politician Vahe Tadevosyan (born 1983), Armenian football striker Yeghishe Tadevosyan (1870-1936), Soviet-Armenian painter