Pinchos Rieszanski (Pinhosas Riešanskis) (192?–?) was born in Vilnius. In 1937, he graduated from the private “Oswiata” Gymnasium in Vilnius. The exact date when he began his studies at Vilnius University cannot be established due to insufficient data. On 18 September 1940, Rieszanski enrolled in the Medical Department of the Faculty of Mathematics and Natural Sciences at Vilnius University. However, his application was ultimately rejected due to incomplete documentation, and he did not start his studies. On 14 October of the same year, he submitted a new application to study in the Biology Department of the Faculty of Mathematics and Natural Sciences at Vilnius University and was accepted. One document also indicates that Rieszanski studied in the Chemistry Department, but there is no information on when he chose this field. On 19 September 1941, he was expelled from the university by the Order of 17 September 1941 of the Department of Higher Education under the Board of Education, which was subordinate to the National Socialists. No further information on the fate of Rieszanski is known.