Jakob Koppel Löwenstein (also Moshe Yaakov Kopel HaLevi Lewenstein; August 17, 1799, in Bruchsal – July 27, 1869,[1][2] in Tauberbischofsheim) was a German rabbi and writer in Baden.
He studied first at the Yeshiva in Bruchsal, then from 1813 in Karlsruhe under Ascher Löw and Aron Ettlinger (father of Jacob Ettlinger, friend of Jakob Löwenstein from his youth), from 1816 in Mainz under Abraham Naftali Hertz Scheuer, from 1820 in Hanau under Moses (Moshe Tuvia) Sontheim,[2] and from 1825 in Würzburg under Abraham Bing.
[1] In 1829 Löwenstein married Regina (Rechel) Ettlinger (born 1806 in Karlsruhe; died 1880).
In July 1852 he took over the district rabbinate in Tauberbischofsheim, a position he held until his death.
[1] Löwenstein authored Menorah Tehorah (in German) in opposition of the reformists.