GUINZBERG, Aaron, rabbi, born in Prague, Bohemia, in 1812; died in Boston, Massachusetts, 20 July, 1873. After a thorough rabbinical and general education in his native city, he was appointed rabbi of Libochowitz, Bohemia. In 1846 he wrote a spirited defence of Judaism, and demanded political emancipation for the Jews of Austria. His work, "Dogmatisch-historisch Beleuchtung des alten Judenthums," was dedicated to Sir Moses Montefiore, but its tone was too liberal for the government, and soon after its publication he emigrated to the United States, where he officiated as rabbi in Baltimore, Rochester, and Boston. Dr. Guinzberg was a man of considerable erudition, which he strove to utilize for the moral advancement of his brethren and the vindication of his religion. He was favorably known as a teacher of distinction at various institutes of learning. He was a frequent contributor to the Jewish and general press, and his writings were usually of a polemic character. He belonged to the conservative school.