What do we want to know?
Actually, there are two questions. One has to do with the internal structure of the Rozdol families - those we understand to be descended from Pinkas and Sara Rivka. We have death records with ages for two of their sons, so we know that Israel Joel was born about 1807 and Aron was born about 1818. There appear to be at least two other sons - Izak and Samuel or David or more likely David Samuel.
There are, however, some complications, particularly with the descendants of the son Isak, and there is a possibility that DNA testing can shed some light here. Unfortunately, the best candidates for autosomal testing are second- and third-great-grandchildren of Pinkas and Sara Rivka, which is pretty distant for that kind of testing. And there are enough cousin marriages in those families to make those tests even less reliable than usual.
|My best estimation of the Rozdol Pikholz families. (Click to enlarge.)
The red bars indicate relationships for which we have no direct evidence.