Ošeras Kruglikas was born on 16 August 1922 in Vilnius into a family of Vilnius Jews. His father Aizyk was from Indura in the powiat of Hrodna (Belarus), and his mother’s name was Lėja Ebicz. The family lived on Stepono Street 32. From 1930–1938 he attended the class with intensified teaching of the humanities at the coeducational gymnasium Oświata (Enlightenment) of the Vilnius Central Jewish Committee. After graduating from the gymnasium in 1938, he enrolled in the Faculty of Humanities of the Vilnius Stephen Bathory University. In 1939, he applied for permission to continue the fourth semester of his studies of the German language and literature in the Faculty of Humanities of Vilnius University, and was accepted on 16 January 1940. Because he was a Jew, on 19 September 1941 Ošeras Kruglikas was expelled from the Faculty of Humanities of Vilnius University on the basis of the Order of 17 September 1941 of the Higher Education Department of the Board of Education, which was subordinate to the Nazis. He was imprisoned in the Vilnius Ghetto and was killed there together with his sister Chana.