ΑΘ (ATh)
ΑΘ is an Ancient Greek form of ἅτε, meaning “inasmuch as, as, seeing that”. It is the adverb.
Found 70 times in the Ancient Greek texts on Socratos.
Where it is used
Aristophanes, Lysistrata 418: ἅθʼ ἁπαλὸν ὄν· τοῦτʼ οὖν σὺ τῆς μεσημβρίας
Aristotle, Constitution of the Athenians frag_3.3: τριττύς ἐστι τὸ τριτον μέρος τῆς φυλῆς· αὕτη γὰρ διῄρηται εἰς τρία μέρη, τριττῦς καὶ ἔθνη καὶ φατρίας, ὥς φησιν Ἀ. ἐν τῇ Ἀθ. πολ.
Bacchylides, Epinicians 8.22: οὔτις ἀνθρώπων κ[αθʼ Ἕλλα-
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.