According to Geni, the father and son are, respectively, my 8-th and 7-th great-grandfathers. Accordingly, I would like to learn their real names.
Geni found 8 'smart' matches of the Moshe Rappopor with MyHeritage profiles. According to two of these matches, his son's name was not Moses, but Meir. Other six matching profiles do not mention his son.