Years: 1817–1896
Primary city: Kovno
Rabbi Yitzchak Elchanan Spektor served as the Chief Rabbi of Kovno and was a leading halachic decisor of 19th-century Russian Jewry. His responsa, including Be'er Yitzchak and Ein Yitzchak, addressed significant halachic questions of his time, often demonstrating a tendency toward leniency.