"teetotaler, one who practices or advocates total abstinence from intoxicating drink," 1860, from Late Greek nēphalismos, from nēphalios "sober," from nēphein "be sober," often metaphorical, from IE *(n)egwh-"sober," with negative particle + *hegwh- "drink." Related: Nephalism (1859).
Old English neodian "be necessary, be required (for some purpose)," intransitive; also transitive, "require, have need of," from the same root as need (n.). Meaning "to be under obligation (to do something)," especially in negative or interrogative sentences implying obligation or necessity, is from late 14c. Related: Needed; needing. The adjectival phrase need-to-know is attested from 1952. Dismissive phrase who needs it?, popular from c. 1960, is a translated Yiddishism.
Need, especially in negative and interrogative sentences implying obligation or necessity, is often used, in the present, before an infinitive, usually without to, need being then invariable (without the personal terminations of the second and third persons singular): as, he or they need not go; need he do it? [Century Dictionary]