Rav Chaim Tzvi Ehrenreich, mechaber of ShU”T Kav Chaim, was born in Savrantz. His grandfather was Rav Avrohom Yehuda Schwartz, the Kol Arye. His primary teacher was his brother, Rav Shlomo Zalman Ehrenreich, Rav of Shamlau and mechaber of Lechem Shlomo. Rav Chaim Tzvi became Rav of the Mahd community when he was fifty-seven, succeeding his father-in-law. He was also Av Bais Din of Mahd for over thirty years. In 1923, he published Ketzei HaMateh on the Mateh Ephraim (by Rav Ephraim Zalman Margulies of Brodt) on the halochos of Chodesh Elul and Chodesh Tishrei. In 1932, he published Shaarei Chaim on Shaarei Ephraim, dealing with halochos of Krias HaTorah. His magnus opus, Kav Chaim, comprised 102 (gematria of Kav) teshuvos in practical halocha.
