Valavanis (), with the female form being Valavani () is a Greek surname. Notable people with the surname include: George Valavanis, Greek journalist and writer Nadia Valavani (born 1954), Greek politician and government minister Panos Valavanis (1954–2025), Greek classical archaeologist Stefan Valavanis (also known as Stefan T. Vail; died 1958), a Harvard econometrician William N. Valavanis (born 1951), American bonsai artist