Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
όναγροι wild donkeys LXX.Ps.104.11
ονάγρων wild donkeys LXX.Dan.5.21

Liddell-Scott-Jones

ὄναγρος (onagros) a wild donkey G:N-M

ὄναγρος, ,

={ὄνος ἄγριος}, the wild ass, [LXX+1st c.BC+]

__II a kind of catapult, ={μονάγκων}, [Refs 6th c.AD+]

LSJ Scripture Refs: LXX.Ps.103.11*