Latin word onomatopoeia comes from Ancient Greek ὀνομᾰτοποιῐ́ᾱ

Detailed word origin of onomatopoeia

Dictionary entry	Language	Definition
ὀνομᾰτοποιῐ́ᾱ	Ancient Greek (grc)
onomatopoeia	Latin (lat)	(rhetoric) onomatopoeia (the forming of a word to resemble in sound the thing that it signifies).