Ῥοδανός
Ῥοδανός, Rhodanus, the river Rhone
Could not find Ῥοδανῷ in Logeion dictionaries.
Ῥοδανῷ Proper-name noun: masculine dative singular of Ῥοδανός
Ῥοδανός — Rhodanus river (Gallia), Pleiades 148168
Ῥοδανός, οῦ (ὁ) [ᾰ] = lat. Rhŏdănus, le Rhône, fl. de Gaule, Arstt. Meteor. 1, 13 ; Plut. Mar. 15, etc.