When Paul A Klotz was born in 1914, his father, August Klotz, was 30 and his mother, Mary Reuss, was 29. He died in 1992, at the age of 78.
German: nickname for a clumsy, awkward man, from Middle High German klotz ‘lump, block’. Compare Klutts and Kluttz .
Jewish (Ashkenazic): cognate of 1 above, from German Klotz ‘lump, block’, or Yiddish klots.