Yisroel Hopstien (1737–1814), also known as the Maggid of Kozhnitz, was one of the more important Hasidic leaders of Poland during the 18th and early 19th century . He was a student of the Magid of mezritch and Rebbe Reb Melekh Elimelech of Lizhensk. He wrote a lot of books on Hasidut and Kabalah.
He was married to Raziel. They had 3 children: Rabbi Moshe Elyakim who replaced his father as Rebbe after R' Israel passed away. Leah Perl the wife of R' Avi Ezra Zelig Shapira, Rabbi of Grenitz. And finally, R' Motel who passed away in his youth.