"A foot soldier equipped with a pelta and javelin", Early 17th cent.; earliest use found in Philemon Holland (1552–1637), translator. From classical Latin peltasta foot soldier equipped with a pelta from ancient Greek πελταστής, either from πελτάζειν to serve as a peltast (from πέλτη) + -τής, suffix forming agent nouns, or from πέλτη + -στής (in ἀσπιστής soldier equipped with a shield from ἀσπιδ-, ἀσπίς shield + -τής, suffix forming agent nouns).[peltast etymology, peltast origin, 英语词源]