 Rapolionis entered his name as "Stanislovas, son of Jurgis of Raseiniai, Diocese of Samogitia" ("Stanislaus Georgy de Rozeny dioecesis Smodiensis") possibly to obscure his identity as he, a former monk, was joining a Catholic university.He graduated with a baccalaureate in 1532 or 1533.There is no information available on Rapolionis' activities from 1532 to 1542.