Ῥωμαῖον (Rhomaion)
Ῥωμαῖον is an Ancient Greek form of Ῥωμαῖος, meaning “Romaios — a Roman”. It is the accusative singular masculine noun.
Found 50 times in the Ancient Greek texts on Socratos.
Where it is used
Plutarch, Numa 3.2: … προτέροις τοῖς Ῥωμαίοις τῶν Σαβίνων τὴν αἵρεσιν, ἔδοξε μᾶλλον ἑλέσθαι Σαβῖνον αὐτοὺς ἀποδείξαντας ἢ παρασχεῖν Ῥωμαῖον ἐκείνων ἑλομένων.
Pausanias, Description of Greece 1.18.3: πλησίον δὲ πρυτανεῖόν ἐστιν, ἐν ᾧ νόμοι τε οἱ Σόλωνός εἰσι γεγραμμένοι καὶ θεῶν Εἰρήνης ἀγάλματα κεῖται καὶ Ἑστίας, ἀνδριάντες δὲ ἄλλοι τε καὶ Αὐτόλυκος ὁ παγκρατιαστής· τὰς γὰρ Μιλτιάδου καὶ Θεμιστοκλέους εἰκόνας ἐς Ῥωμαῖόν τε ἄνδρα καὶ Θρᾷκα μετέγραψαν.
All forms of Ῥωμαῖος (declension table)
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.