Ῥοδανός
Ῥοδανός, Rhodanus, the river Rhone
Could not find Ῥοδανοῦ in Logeion dictionaries.
Ῥοδανοῦ Proper-name noun: masculine genitive 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.