Moses (Morris) Mendelsohn and his wife Leah Ellen Goldberg Mendelsohn were born (probably in Warsaw) around 1832 and emigrated to the US (New York) between 1864 and 1870.  They had four children in Warsaw: Isaac J., Joseph H., Hyman (Herman), Louis and another three in New York (Frank - my great-grandfather, Charles and Bertha (Betsy) - later married to Sender Federbush.  We have not been able to find tombstones for either Moses or Leah and are unsure about the immigration records we have found them all on many census records but immigration dates seem different for all, which is unlikely but possible  We would be particularly interested in tracing their ancestors back in Warsaw and was hoping the tombstones might give us names of their fathers.   I have looked at JewishGen and GesherGalicia Warsaw records to no avail.  Suggestions would be greatly appreciated.
Thanks, Beth