ἐών (eon)
ἐών is an Ancient Greek form of εἰμί, meaning “to be, exist”. It is the present active participle nominative singular masculine.
Found 509 times in the Ancient Greek texts on Socratos.
Where it is used
Apollonius Rhodius, Argonautica 1.32: Ὀρφέα μὲν δὴ τοῖον ἑῶν ἐπαρωγὸν ἀέθλων
Euripides, Heracleidae 175: δοὺς μηδέν, ἀλλὰ τἄμ’ ἐῶν ἄγειν ἐμὲ
Sappho, Poems and Fragments (ed. Edmonds 1922) 99.1: . . . ἀλλʼ ἔων φίλος ἄμμιν
All forms of εἰμί (conjugation 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.