Tzvi Ashkenazi
Rabbi Tzvi Ashkenazi (1656–1718) known as the Chacham Tzvi, for some time rabbi of Amsterdam, was a resolute opponent of the followers of Sabbatai Zevi. In Salonica he also witnessed the impact of the Sabbatai Zevi movement on the community, and this experience became a determining factor in his whole career. His son Jacob Emden served as rabbi in Emden and followed in his father's footsteps in combating the Sabbatean movement.
Read more about this topic: Sabbateans, Rabbis Who Opposed The Sabbateans