Atos Wirtarnen (January 27, 1906 - March 10, 1979) was a Finnish journalist born in Saltvik, Atos was once a friend of Tove Jansson.
He rose to fame by parliament from the SDP list, and after that he went to multiple parties from 1946 to 1955. He was once fired for two magazines for he wrote articles in. Atos was close friends with Tove and once he was his fiance, and he was the main inspiration for Snufkin after his green hat. But then they went separate ways and Snufkin became a coded expression of homosexuality (according to Tove).