In 1932, Samuel Krauss ventured the theory that the biblical Ashkenaz referred to northern Asia Minor, and he identified it as the ancestral homeland of the Khazars, a position which was immediately disputed by Jacob Mann. Ten years later, in 1942, Abraham N. Polak (sometimes referred to as Poliak), later professor for the history of the Middle Ages at Tel Aviv University, published a Hebrew monograph in which he concluded that the East European Jews came from Khazaria. D.M. Dunlop, writing in 1954, thought that very little evidence supported what he considered a mere assumption, and he also argued that the Ashkenazi-Khazar descent theory went far beyond what "our imperfect records" permit. In 1955, Léon Poliakov, who assumed that the Jews of Western Europe resulted from a "panmixia" in the first millennium, asserted that it was widely assumed that Europe's Eastern Jews were descended from a mixture of Khazarian and German Jews. Poliak's work found some support in Salo Wittmayer Baron and Ben-Zion Dinur, but was dismissed by Bernard Weinryb as a fiction (1962). Bernard Lewis was of the opinion that the word in Cairo Geniza interpreted as Khazaria is actually Hakkari and therefore it relates to the Kurds of the Hakkari mountains in southeast Turkey.
