An Etymological Dictionary of the German Language/Annotated/Tobel

by Friedrich Kluge

Tobel, masculine, ‘narrow valley,’ from Middle High German tobel, Old High German tobal, masculine, ‘forest ravine, valley’; a derivative of the Teutonic root dub, dup (see Tief), to which Lithuanian daubà, dauburà, ‘valley,’ Old Slovenian duplĭ, ‘hollow,’ dĭbrĭ, ‘valley, ravine,’ are primitively cognate (Aryan root dhup, dhub).