φράτερας (phrateras)

φράτερας is an Ancient Greek form of φράτηρ, meaning “member of a; those of the same”. It is the accusative plural masculine noun.

Found 27 times in the Ancient Greek texts on Socratos.

Where it is used

Demosthenes, Against Boeotus I 30: … ν, πλὴν ὅτι κἀμὲ ζῶν ἐποιήσατο Μαντίας. τί τεκμήριον, εἴ τίς σʼ ἔροιτο, ἢ μαρτύριόν ἐστί σοι τούτου; εἰς τοὺς φράτεράς μʼ εἰσήγαγε, φήσειας ἄν. τί οὖν σʼ ἐνέγραψεν ὄνομα, εἴ τις ἔροιτο, Βοιωτὸν ἂν εἴποις· τοῦτο γὰρ εἰσήχθης.

Aristophanes, Birds 1669: ἤδη σʼ ὁ πατὴρ εἰσήγαγʼ ἐς τοὺς φράτερας;

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.