The Kebra Nagast is a great storehouse of legends and traditions, some historical and some of a purely folk-lore character, derived from the Old Testament and the later Rabbinic writings, and from Egyptian (both pagan and Christian), Arabian, and Ethiopian sources. Of the early history of the compilation and its maker, and of its subsequent editors we know nothing, but the principal groundwork of its earliest form was the traditions that were current in Syria, Palestine, Arabia, and Egypt during the first four centuries of the Christian era. Weighing carefully all that has been written by Dillmann, Trump, Zotenberg, Wright, and Bezold, and taking into account the probabilities of the matter, it seems to me that we shall not be far wrong if we assign the composition of the earliest form of the Kebra Nagast to the sixth century A.D. Its compiler was probably a Coptic priest, for the books he used were writings that were accepted by the Coptic Church. Whether he lived in Egypt, or in Aksûm, or in some other part of Ethiopia matters little, but the colophons of the extant Ethiopic MSS. of the Kebra Nagast suggest that he wrote in Coptic.
In the succeeding centuries, probably as a result of the widespread conquests of Muḥammad and his Khalîfahs, the Coptic text was in whole or part translated into Arabic, and during the process of translation many additions were made to it, chiefly from Arabic sources. Last of all this Arabic version was translated into Ethiopic, and proper names underwent curious transformations in the process. According to the colophons of the MSS. in the British Museum, Oxford, and Paris, the Arabic translation was made from the Coptic in the 409th "year of mercy," when Gabra Masḳal, commonly known as Lâlîbalâ, was reigning over Ethiopia, i.e. between A.D. 1314 and 1344. And the same authorities say that the Ethiopic translation was made subsequently by one Isaac, of whom nothing is known save that he was an enthusiastic Christian visionary and patriot. His knowledge of history and chronology was defective, and his comparative philology is unusually peculiar, even for the period in which he lived.