Ἀρείου (Areiou)
Ἀρείου is an Ancient Greek form of Ἄρειας, meaning “Areias — the only river of Aria. It rises at Obeh in the Paropamisan mountains, and having run westerly…”. It is the genitive singular masculine noun.
It can also be a form of Ἀρείος, “Areios — or AREIUS, the celebrated heretic, is said to have been a native of Libya, and must have been… (and others of the name)”.
Found 82 times in the Ancient Greek texts on Socratos.
Where it is used
Plutarch, Solon 19.2: … ὁρμοῦσαν ἧττον ἐν σάλῳ τὴν πόλιν ἔσεσθαι καὶ μᾶλλον ἀτρεμοῦντα τὸν δῆμον παρέξειν. οἱ μὲν οὖν πλεῖστοι τὴν ἐξ Ἀρείου πάγου βουλήν, ὥσπερ εἴρηται, Σόλωνα συστήσασθαί φασι· καὶ μαρτυρεῖν αὐτοῖς δοκεῖ μάλιστα τὸ μηδαμοῦ τὸν Δράκο …
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Liddell-Scott-Jones, A Greek-English Lexicon (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.