Aatos is a Finnish masculine given name. People with the name are as follows:
Given name Aatos Erkko (1932–2012), Finnish journalist and businessman Aatos Hirvisalo (1915–1992), Finnish sailor Aatos Jaskari (1904–1962), Finnish wrestler Aatos Lehtonen (1914–2005), Finnish football player Aatos Tapala (born 1940), Finnish actor and opera singer
Middle name Jalo Aatos Fred (1917–2003), Finnish chess player Pentti Aatos Kahma (born 1943), Finnish discus thrower
Others Aatos Punanen, stage name of Jan Erola