Harav Gamliel HaKohen Rabinowitz is a Rosh Yeshiva of Shaar Hashamayim Yeshiva in Yerushaliam. He is a recognized expert in both Halacha and Kabbalah. Rav Gamliel is the son of Rabbi Levi Rabinowitz (1920-2015), author of Maadanei Hashulchan and Maadanei Malakhim, and grandson of Rabbi Gamliel Rabinowitz, a rosh yeshiva in Kishinev and posek in the beis din of the Chortkover Rebbe, Rabbi Dovid Moshe Friedman. His family possesses rare documentation attesting to their status as Kohanim, tracing their ancestry back to the Shach. The family surname was originally Rappaport; the name was changed in response to a Russian government decree that conscripted all second sons for the Imperial Russian Army. Rav Gamliel lives in the Zikhron Moshe neighborhood of Yerushaliam.(Excerpt from Wikipedia)