Zvi Hirsch ben Yaakov Ashkenazi (Hebrew: צבי אשכנזי) received instruction from his father, R' Yaakov Zak, and grandfather, R' Efraim HaKohen, and subsequently traveled to Salonica to further his studies. He was ordained by the Rabbinate of Constantinople, who bestowed upon him the honorific Sephardi title "Chakham." While in Greece, he witnessed the effects of Shabbetai Tzvi and consolidated his anti-Sabbatian views. He returned to Moravia, but political upheaval forced him to move first to Altona and then Amsterdam. His time in Amsterdam was fraught with difficulty; much of it spent fighting Sabbatian sympathies. His uncompromising position resulted in major communal instability which forced him to flee the city, first to Emden and then London, where he wielded tremendous influence and was offered the position of Chief Rabbi. He declined, however, and subsequently returned to Emden. An opponent of pilpul, his responsa are held in high esteem for their lucidity and focus. They were published under the title "Responsa of Chakham Tzvi."
Works on Sefaria
A