Eleuter may refer to: Jerzy Eleuter Szymonowicz Siemiginowski (1660–1711), aka Siemiginowski-Eleuter (c. 1660 – c. 1711), a Polish painter and engraver Pseudonym of Jarosław Iwaszkiewicz (1894–1980), a Polish writer See also Eleutherius (disambiguation) Eleuterio Polish given names