Onomacritus (‹See Tfd›Greek: Ὀνομάκριτος; c. 530 – c. 480 BC), also known as Onomacritos and Onomakritos, was a Greek chresmologue, or compiler of oracles, who lived at the court of the tyrant Pisistratus in Athens and prepared an edition of the Homeric poems. He was a collector and forger of oracles and poems.