The Klump(p) name is most often found coming from Baden or Württ., area of Germany. However, sometimes one went to a different area first, like Switzerland or Alsace, then came to America. Klumph most often came from the Holland area. More rare did you find a Klumpp from Bavaria. Was your Klump Catholic?That sometimes can be a clue to his origins. I work mainly on the Klumpp surname from Württ., but collect all that I find as many spelling changes were made along the Klump, Klumpp, Klumph, Clump paths of life. I will look through my material and see if I have anything for you. Do you have birthdates?