An Etymological Dictionary of the German Language/Annotated/Kumpf
Kumpf, masculine, ‘basin, bowl,’ from Middle High German kumpf, masculine, ‘vessel’; compare Low German kump. A Middle Latin cumpus as the source of the German word does not exist; Middle Latin cumba, cumbus, have too no such meaning as Kumpf, hence they cannot be adduced to explain the dialectic Modern High German Kumme, ‘deep bowl.’ Kumme and Kumpf are more probably genuine Teutonic words, and allied to Anglo-Saxon cumb and the equivalent English coomb.