Rabbi Yosef David Eisenstadt, A.B.D. Mir

http://www.jewishgen.org/yizkor/kletsk/kle021.html R. Moshe's son-in-law was Rabbi Yosef Dovid Ben Tzvi Hirsch, Av Beis Din of Mir, one of the sages of the generation in Lita. He was born in Zhitel in 5587 [about 1826][13] (according to the “City of Vilna” – he was born in Vilna, and from there his parents moved to Zhitel). His (paternal) maternal grandfather R. Chaim was the rabbi of the town. When he was still young he became known as a genius. He married Rabbi Moshe Eisenshtadt, the Av Beis Din of Kletzk's daughter Malka. During that time Rabbi Elazar Kallir would stay in Kletzk when he would come to visit his sister Finkel, who is mentioned above. He made a point to know this young man who was visiting his brother-in-law and sister and saw him as marriageable. The two of them would converse on Torah matters, and he gave his approval for this match. Later, Rabbi Yosef Dovid sent his scholarly insights to his wife's uncle, who was a rabbi in Austria at the time. In time he became the Rabbi / Av Beis Din in Kletzk. And when he turned 26 years old he was elected Av Beis Din in the community of Mir, the famous city of Torah, where he was instrumental in fundraising for the magnificent yeshiva that was established during his tenure as rabbi in Mir. (See the article entitled “Mashal V'Nimshal”, “Davar”, 1937, Erev Rosh Hashanah page). He became famous as the sage of the generation. His [letters of] approbation appeared together with those of the sages R. Dovid of Navahrudak, R. Velveli of Tiktin-Bialystok, R. Yaakov of Karlin, R. Leibele Katzenellebogen of Karlin, and others. He [Moshe] passed away in the year 5606 [about 1846]. Many great Torah scholars and famous Jewish people from different areas are related to this sage. Among them are the members of the famous Shershevsky family in Warsaw.

See Zhitel Yzkor book page 228 - image 236 http://yizkor.nypl.org/index.php?id=2746