Students of the history of North Africa in general, and of the history of the Jews there in particular, commonly think that a considerable proportion—one half or more—of the Jews who live, or until recently lived, in North Africa are descended from the Berbers, who prior to the Arab conquest formed the overwhelming majority of the population. In their opinion, these Jews were the offspring of tribes among which Jewish beliefs spread in the pre-Arab era and part of which actually embraced Judaism. This assumption, which seemingly answers the question as to the origin of the Jews who inhabited the North African hinterland, and especially the districts bordering on the Sahara, has gained such wide currency that the term ‘Berber Jew’ has been coined, i.e. Jew descended from Judaized Berbers. The proponents of this assumption apparently suppose that the stories of Jews, or Judaized people, living among Berber tribes, though describing events of the late Middle Ages or of modern times, reflect conditions precedent to the Muslim conquest of North Africa. In other words, the supporters of the theory of the Judaized Berbers think that this phenomenon cannot have originated in Muslim times since the new religion precluded every chance of Jewish proselytizing. If, therefore, Judaized people are found in Africa, even in recent times, they must be remnants of a religious movement going back to the period before the Arab conquest. In the view of the adherents of this theory, Judaism spread among the Berbers during the first centuries of the Christian era.