Rutgerus Lange and Anna Maria Loeffen did not have a son named Paul. In fact, they do not have any male line Lange descendants at all, because both their sons died without children (one at a very young age and one as a Roman catholic priest, unmarried). If Paul and Ditje Lange actually existed then they must have a different link to the Lange family or they are belonging to an entirely different family living in an entirely different part of the Netherlands. I suspect the latter is the case, because in the search engine of the archives of Noord-Brabant (www.bhic.nl) there is no record at all of any Paul/Paulus/Poulus Lange or Langen at all