Avenarius (translated from ) may refer to: Ferdinand Avenarius (1856–1923), a German poet Georgy Alexandrovich Avenarius (1903–1958), one of the founders of Soviet film criticism Johannes Avenarius, or Johann Habermann (1516–1590), a theologian Richard Avenarius (1843–1896), a philosopher Latin-language surnames Occupational surnames Surnames of German origin