ὅτου (hotou)
ὅτου is an Ancient Greek form of ὅστις, meaning “whoever, whatever; who, which”. It is the genitive singular masculine pronoun.
Found 445 times in the Ancient Greek texts on Socratos.
Where it is used
Thucydides, History of the Peloponnesian War 1.23.5: διότι δ’ ἔλυσαν, τὰς αἰτίας προύγραψα πρῶτον καὶ τὰς διαφοράς, τοῦ μή τινα ζητῆσαί ποτε ἐξ ὅτου τοσοῦτος πόλεμος τοῖς Ἕλλησι κατέστη.
Procopius, De Bellis 8.7.1: Ὅτου δὲ ὁ Χοσρόης ἕνεκα Λαζικῆς μεταποιεῖσθαι διὰ σπουδῆς εἶχεν ἤδη μὲν πρόσθεν μοι ἐρρήθη· ὃ δὲ δὴ αὐτόν τε καὶ Πέρσας μάλιστα πάντων ἐς τοῦτο ἤνεγκεν, ἐνταῦθα δηλώσω, ὅτι δὴ καὶ χώραν τήνδε περιηγησάμενος ξύμπασαν σαφῆ τὸν περὶ τούτου πεποίηκα λόγον.
All forms of ὅστις (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.