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R. Abraham ben Solomon Zalman Ragoler (18th century) was a Lithuanian rabbi and preacher, brother of R. Elijah ben Solomon Zalman, Gaon of Vilna. R. Abraham was born in Vilna, but because of the controversy between Hasidim and Mitnaggedim he moved to Ragola and was thereafter called R. Abraham of Ragola or "the Hasid ("righteous one") of Ragola." He was appointed preacher in Shklov. In addition to Ma'alot ha-Torah (1828), he left in manuscript a kabbalistic commentary to the tractate Megillah and a commentary to the Book of Esther.