Son-in-law of the aforementioned R. Eliyahu Shmuel, and served as rabbi in place of his father-in-law after his passing, together with his brother-in-law (as below).1)
Perhaps he is R. Moshe Zacher mentioned in Yizkor Bukh fun Rakishak un Umgegnt, p. 328, where in an article on the town of Subat the author writes that he heard from the Gaon of Rogatchov in these words: “Mosheke der Altinker kan lernen” (“Old Mosheke knows how to learn”).“