The Estreichers were a family of notable humanists and scientists from Kraków, Poland, which included:
Dominik Oesterreicher (1750–1809), painter and scholar of fine arts Alojzy Estreicher (1786–1852), botanist and entomologist, Dominik's son Karol Estreicher (senior) (1827–1908), historian of art and theater, literary critic and bibliographer, Alojzy's son Stanisław Estreicher (1869–1939), historian of law and bibliographer, Karol Senior's son Tadeusz Estreicher (1871–1952), chemist and historian, Karol Senior's son Karol Estreicher (junior) (1906–1984), historian of law, writer and bibliographer, Stanisław's son Stefan Karol Estreicher (1952–), theoretical physicist, Tadeusz's grandson
Other people with the same surname include:
Samuel Estreicher (b. 1948), American jurist
See also Österreicher (surname)