Zvi Hirsch Hirsh Kaidnover

From breslev.co.il:

Born: 1650 in Vilna, and died at Frankfort-on-the-Main in 1712. He was the son of Rabbi Aaron Samuel Kaindanover; pupil of Rabbi Yoseph ben Yudah Yeidel, Rov of Minsk and later of Dubno. Rabbi Yoseph's teaching exercised a considerable influence upon his pupil, especially in the Kabbalistic trend of his studies; whereas in the Halachah, Rabbi Kaindanover followed more closely his father. In his native place Kaindanover, with his whole family, was thrown into prison on account of a base denunciation, and was forced to languish in chains for years until he was pardoned, his son being retained in prison at Slutsk. Fearing another imprisonment, he decided to settle in Frankfort-on-the-Main. In Frankfort he recovered from the trials through which he had passed and found leisure to engage in literary pursuits. Besides publishing his father's works, which he in part accompanied with notes (as in the case of "Birkas Shemuel"), he wrote a book on morals entitled "Kav ha-Yashar," being a combination of ethics and asceticism. It has passed through numerous editions since its first appearance at Frankfort in 1705. The book contains 102 chapters, corresponding to the numerical value of "Kav" the numerical value of his first name, Tzvi. "Ha-Yashar" is an anagram of the author's name Hirsch .

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צבי הירש ב"ר אהרן שמואל קאידנובר

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