Felis Jomantas (1894–?) was born in Liepaja (Latvia). His father – Benediktas – was a railway worker from Medingėnai, and his mother was from Kretinga. In 1985, together with his parents, he went to Romnai, where in 1906 he graduated from an elementary school. In 1910, he completed four more forms at the city’s secondary school. In 1911, he moved to Lithuania with his parents, namely, to Ašmena county. In 1912-1915, he worked in a private zoological laboratory in Petrapilis. In 1919-1921, he was employed at the Kaunas Nature Research Station as a laboratory preparator, and in 1921-1923, he was a laboratory assistant at the same research station. In 1923-1930, he worked as a preparator at the Cabinet of Zoology of the University of Lithuania, and in 1930-1940, he worked as a preparator at Vytautas Magnus University Cabinet of Zoology. In 1940, he moved to Vilnius and got a job as a preparator at Vilnius University Cabinet of Zoology. A few months later, he became the chief laboratory assistant of the Cabinet of Vertebrate Zoology. In 1946, he asked to be dismissed from the position of superintendent of Vilnius University. On 31 May 1948, he was let go. According to the database Deportations and Imprisonment of the Lithuanian Population in the Soviet Union, it can be assumed that Felis Jomantas was arrested and sent to the Krasnoyarsk Krai. His exile ended in March of 1958.