AlexanderyoudaoicibaDictYouDict[Alexander 词源字典]
masc. proper name, from Latin, from Greek Alexandros "defender of men," from alexein "to ward off, keep off, turn (something) away, defend, protect" + aner (genitive andros) "man" (see anthropo-). The first element is related to Greek alke "protection, help, strength, power, courage," alkimos "strong;" cognate with Sanskrit raksati "protects," Old English ealgian "to defend." As a kind of cocktail, it is attested from 1930.[Alexander etymology, Alexander origin, 英语词源]