Thanasis (Θανάσης) is a Greek given name, short for Athanasios (Αθανάσιος), which can mean "eternal life" or "immortal".
Notable people with the name Thanasis or Thanassis include:
Thanasis Antetokounmpo (born 1992), Greek basketball player Thanasis Giannakopoulos (1931–2019), Greek businessman Thanasis Kanoulas (born 1992), Greek football player Thanasis Kolitsidakis (born 1966), Greek former footballer Thanassis Lefas, 20th and 21st century motorcycle engineer Thanasis Lightbridge (born 1978), Greek keyboard player and composer, founder of electronica art metal band Dol Ammad Thanasis Martinos (born 1950), Greek shipowner and real estate investor Thanasis Pafilis (born 1954), Greek politician and Member of the European Parliament Thanasis Paleologos (born 1977), Greek footballer Thanasis Papakonstantinou (born 1959), Greek singer-songwriter Thanasis Papazoglou (born 1988), Greek footballer Thanasis Sentementes (born 1975), Greek footballer Thanassis Skordalos (1920–1998), Cretan musician Thanassis Stephopoulos (1928–2012), Greek artist Thanassis Tsakiris (born 1965), biathlete and cross-country skier Thanasis Veggos (1927–2011), Greek actor
See also Who Is Thanassis, a 1969 Greek film Thanasi Kokkinakis, Australian tennis player