An Etymological Dictionary of the German Language/Annotated/Klumpe
Klumpe, Klumpen, masculine, ‘slump, lump,’ Modern High German only; from the equivalent Low German klamp, Dutch klomp, masculine; compare English clump. Scandinavian klumba, feminine, ‘club,’ with a different labial, also a variant klubba; klubbu-fótr, whence the equivalent English ‘club-foot.’ Further references have not been discovered. Compare Kolben.