The origin of the name Oscar is uncertain. Many stories are there and one story says that the executive director of the Academy, Margaret Herrick, remarked that the statuette resembled her Uncle Oscar. It is said that name was officially adopted by the Academy only in 1939 and this comment was spread through Hollywood columnist Sidney Skolsky who was there at that time. Skolsky used it in a piece referring to Katharine Hepburn’s first Best Actress win in 1934.
Source: Oscar Awards 2022: Interesting Facts 10 Interesting Facts About Oscar Awards