αἷς (hais)
αἷς is an Ancient Greek form of ὅς, meaning “who, which, that (relative); his own”. It is the dative plural feminine pronoun.
Found 759 times in the Ancient Greek texts on Socratos.
Where it is used
Thucydides, History of the Peloponnesian War 1.28.2: εἰ δέ τι ἀντιποιοῦνται, δίκας ἤθελον δοῦναι ἐν Πελοποννήσῳ παρὰ πόλεσιν αἷς ἂν ἀμφότεροι ξυμβῶσιν· ὁποτέρων δ’ ἂν δικασθῇ εἶναι τὴν ἀποικίαν, τούτους κρατεῖν. ἤθελον δὲ καὶ τῷ ἐν Δελφοῖς μαντείῳ ἐπιτρέψαι.
Euripides, Electra 474a: αῖς Πειρη-
Sappho, Poems and Fragments (ed. Edmonds 1922) 46.8: [αἴς κεν] ἔχοιεν [;]
All forms of ὅς (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.