הרב צבי הירש אשכנזי

Tzvi Hirsch ben Yaakov Ashkenazi, known as the Hakham Tzvi after his responsa by the same title, served for some time as rabbi of Amsterdam. He was a resolute opponent of the followers of the self-proclaimed messiah, Sabbatai Zevi. He had a chequered career due to his independence of character. He visited many lands, including England, where he wielded much influence. His responsa are held in high esteem.