Borensztein, Chaim Yechiel
- Born: Jun 6, 1845, Kozienice, Mazowieckie, Poland
- Marriage (1): Rubin, Ewa (Chava) in 1865 in Magnuszew, Mazowieckie, Poland
- Died: Aug 15, 1928 at age 83
Authority on the Jewish calendar. He wrote many articles on the histo ry of the Jewish calendar. He also translated Shakespeare's play Haml et, and Farys by Adam Mickiewicz, into Hebrew. He was secretary of th e Great Synagogue on Tlomackie Street in Warsaw. He was a friend of N achum Sololow, who wrote an essay about Bornstein in his book Ishim.
He was also a Levite.
Chaim married Ewa (Chava) Rubin, daughter of Yosef Yehudah Rubin and Unknown, in 1865 in Magnuszew, Mazowieckie, Poland.