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.
<a href="https://www.etymonline.com/word/alexis">Etymology of alexis by etymonline</a>
Harper, D. (n.d.). Etymology of alexis. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/alexis