Melasippos

Means "black horse", derived from the Greek adjective μέλας (melas) meaning "black, dark" combined with the Greek noun ‘ιππος (hippos) meaning "horse". Also see the name Melanippos, which is etymologically related and has the same meaning.

You might also want to compare this name with the names Melesippos and Meleusippos, as they tend to get confused with each other due to their striking similarities.

Lastly, Melasippos is the name of a martyr and saint from the 4th century AD, who is better known under the name Melasippus, which is the latinized form of his name.