Yitzchak Blazer

Yitzchak Blazer (Hebrew: יצחק בלאזר) ‎(1837–1907) was an early important leader of the Musar movement.

He is also sometimes referred to as Rav Itzele Peterburger due to his position as Chief Rabbi of St. Petersburg at a time when it was the capital of Russia. he married the mother of the Lomza rav R Moshe Shatskesz when his father was niftar becoming the stepfather of R Moshe Shatskesz Moshe Shatzkes