Ionion

Ionion may refer to
 * Iónion Pélagos (Ιόνιον Πέλαγος), the Greek name for the Ionian Sea

Ships given this name:
 * SS Honduras, a banana boat built in 1915 and named SS Ionion 1955–57
 * MV Empire Sportsman, a coaster built in 1943 and named MV Ionion 1963–85