origin
Balázs Déri's opinion :
Rappaport family allegedly from kohn tribe may descend from "rab" Pápá mentioned in talmud who might have in his days been considered "rab" of the place of the "pope" (pap-ort) whether it referred to Rome or to Pápa in Hungary near river Raab,that is Raab-Pap'-Ort.
See Winter,Kohn !