According to family tradition (records for Kurow, Poland are not publiclyavailable), around 1876 Simha Biniem MANDELBAUM had a son named Benyamin. Are the names "Biniem" and "Benyamin" variants of one another?
Two of my relatives >from the Bialystok region are brothers, b. ca. 1915, named Bunyem and Benjamin. In the U.S. they were known as Bernard (nicknamed Benny) and Ben, respectively.