Κάσιον Save Κάσιον, Casius Mons Could not find Κασίῳ in Logeion dictionaries. Κασίῳ Proper-name noun: neuter dative singular of Κάσιον Κασίῳ Proper-name adjective: masculine dative singular of Κάσιος See Κασίῳ in Morpho Pleiades Κάσιον — Kasios M. (Phoenicia), Pleiades 668224