The Academy Awards are awarded the year after the film's release; the films below are listed with their production year, so the Oscar 2000 went to the best actor in 1999.
... May 11 - Salvador Dalí, artist
May 17 - Jean Gabin[?], actor (+ 1976)
May 21 - Fats Waller, pianist (+ 1943)
May 21 - Robert Montgomery, actor (+ 1981)
June 2 ...