Short answers, pulled from the story.
Ancient sources argue over whether he was the son of Eumolpus and Selene or the child of Orpheus himself. Some accounts name Antiphemus and Helena as his parents while others call him Thracian by origin.
He presided over these ceremonies during the era of Heracles. Pausanias identified a hymn to Demeter as the only genuine work surviving in his own day.
Hipparchus banished Onomacritus from Athens after Lasus of Hermione detected the interpolations within the collection. This incident highlights the difficulty ancient audiences faced distinguishing authentic prophecy from manufactured text.
Ancient sources attribute over ten distinct compositions to this legendary figure including hymns and treatises. A poem called Precepts addressed to his son Eumolpus stretched across 4000 lines according to the Suda.
Plato described Musaeus as both hierophant and prophet within the Protagoras dialogue. Later thinkers like Artapanus and Eusebius identified this Greek poet with Moses the Jewish lawbringer.