His parents are listed as Shmuel stern and Zvia Hersch Stern. Could you present the source for these names?
A memorial page on a book, mentions him as a son of Mordechai. In Petrova there are two interesting death records of people named Stern: Marku (Mordechai) Stern 1810-1866 and Lea stern 1822-1882. I would guess that these are his parents, as the name Lea matches the naming pattern in the family.
