EustaceyoudaoicibaDictYouDict[Eustace 词源字典]
masc. proper name, from Old French Eustace (Modern French Eustache), from Latin Eustachius, probably from Greek eustakhos "fruitful," from eu "well, good" (see eu-) + stakhys "ear (of grain);" see spike (n.1).[Eustace etymology, Eustace origin, 英语词源]