Yitzhak or Isaac Dorbelo was a Franco-Jewish merchant of the early eleventh century CE. He wrote an account of travelling to Poland in the company of Radhanite merchant-venturers. * Kevin Alan Brook. The Jews of Khazaria. 2nd ed. Rowman & Littlefield Publishers, Inc, 2006. * Schipper, Itzhak. "Dzieje Gospodarcze Żydów Korony i Litwy w Czasach Przedrozbirowych." Żydzi w Polsce Odrodzonej, ed. A. Hafftka et al. Warsaw, 1936.