σέο (seo)
σέο is an Ancient Greek form of σύ, meaning “you (sg.), thou”. It is the genitive singular pronoun.
Found 109 times in the Ancient Greek texts on Socratos.
Where it is used
Apollonius Rhodius, Argonautica 1.1: ἀρχόμενος σέο, Φοῖβε, παλαιγενέων κλέα φωτῶν
Callimachus, Hymn to Zeus 54: ἀσπίδος εἰσαΐοι καὶ μή σεο κουρίζοντος.
All forms of σύ (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.