An Etymological Dictionary of the German Language/Annotated/rufen

by Friedrich Kluge

rufen, verb, ‘to call out, cry,’ from the equivalent Middle High German ruofen, Old High German ruofan; corresponding to Old Saxon hrópan, Dutch roepen, Anglo-Saxon hrôpan (wanting in English), ‘to call out’; in Gothic hrôpjan, Old High German ruofen, Modern High German rüefen, weak verb, with the same meaning. In the non-Teutonic languages there are no terms corresponding to the Teutonic root hrôp. See ruchtbar.