\Whom\, pron. [OE. wham, AS. dative hw[=a]m, hw?m. See
{Who}.]
The objective case of who. See {Who}.

Note: In Old English, whom was also commonly used as a
      dative. Cf. {Him}.

            And every grass that groweth upon root She shall
            eke know, and whom it will do boot. --Chaucer.