Yours, Etc.: Origins and Uses of 8 Sign-Offs
Old English besma "bundle of twigs" (used as a broom or a flail), from West Germanic *besmon (cf. Old Frisian besma, Old Saxon besmo, Old High German besmo, German Besen, Dutch bezem), of unknown origin. Perhaps "something bound or twisted," from PIE *bheidh-.
the rendering of a Hebrew word meaning sweeper, occurs only in Isa. 14:23, of the sweeping away, the utter ruin, of Babylon.