1425-75;late Middle Englishcrewe augmentation, hence reinforcements, body of soldiers < Middle Frenchcreue, literally, increase, noun use of feminine of Old Frenchcreu, past participle of creistre to grow < Latincrēscere; see crescent
c.1437, from O.Fr. creue "an increase, recruit, military reinforcement," from fem. pp. of creistre "grow," from L. crescare "arise, grow." Meaning "people acting or working together" is first attested 1570. "Gang of men on a warship" is from 1692. Crew-cut first attested 1938, so called because the style was originally adopted by boat crews at Harvard and Yale.