*ner- 2

masc. proper name, from Latin, from Greek Alexandros "defending men," from alexein "to ward off, keep off, turn (something) away, defend, protect" + anēr (genitive andros) "man" (from PIE root *ner- (2) "man"). The first element perhaps is related to Greek alke "protection, help, strength, power, courage," alkimos "strong;" and cognate with Sanskrit raksati "protects," Old English ealgian "to defend."

As a kind of cocktail recipe featuring crème de cacao and cream, Alexander is attested from 1913; the reason for the name is unclear.

masc. proper name, from Old French Andreu (Modern French André), from Late Latin Andreas (source also of Spanish Andrés, Italian Andrea, German Andreas, Swedish and Danish Anders), from Greek Andreas, a personal name equivalent to andreios (adj.) "manly, masculine, of or for a man; strong; stubborn," from anēr (genitive andros) "man" (from PIE root *ner- (2) "man").

Nearly equivalent to Charles. Andrew Millar (1590s) for some forgotten reason became English naval slang for "government authority," and especially "the Royal Navy." St. Andrew (feast day Nov. 30) has long been regarded as patron saint of Scotland; the Andrew's cross (c. 1400) supposedly resembles the one on which he was crucified.