The debate concerning the Head of the Jews (ra'is al-yahud) in the Fatimid kingdom, which has interested researchers since the late nineteenth century, has yet to reach a final conclusion. Today's researchers usually argue that this position was established in Egypt at the end of the eleventh century with the final fall of the Palestinian Yeshiva; prior to this the Head of the Jews was the gaon of Palestine, appointed by the Fatimid Imam. More recently a new argument has emerged, re-embracing the approach of J. Mann, who argued that the position of the Head of the Jews was established at the beginning of Fatimid rule (late tenth century), and the person to hold the position was a Jewish courtier from the field of finance or medicine, appointed by the Imam to be the supreme leader for all Jews in the Fatimid kingdom: Rabbanites, Karaites and Samaritans. This old–new notion is yet to be clearly proven. Such views are mainly supported by circumstantial analysis of logical arguments that arise from the Geniza documents, without real written proof, but the Geniza is known for surprises and it is possible that we will soon find unequivocal proof to show that the Head of the Jews in the Fatimid kingdom was indeed a Jewish courtier appointed by the Imam, since the beginning of the Fatimid rule over Egypt, Palestine and Syria at the end of the tenth century.