Rabbi Tzvi Hirsh Friedlander is the present Liske (Hasidic dynasty) Hasidic rebbe. He is the brother of the Uhniv (Hivniv) rebbe, author of Chasdei Avraham, a work on visiting the sick in Halacha. His father was Rav Yosef Friedlander, the author of the Tzvi V'Chumid on Torah and the Jewish holidays and a great-grandchild of the Ach Pri Tvia of Liska. He is the author of the Chamdai Tzvi. He became rebbe in 1971, after the death of his father.[1]