Modern coinage, most common in North America. It is of unknown origin, probably a fanciful coinage based on Marlene or Charlene, or both. It became famous in the 1950s as the name of the American actress and beauty columnist Arlene Dahl (b. 1924).
French and English: occupational name for a butcher or slaughterer, Middle English bo(u)cher, Old French bouchier (also with the transferred sense ‘executioner’), a derivative of bouc ‘ram’. Compare Buck 1.