Joseph

Born: Unknown Died: c. 969 Reigned: c. 960 - c. 969 Khanate: Khazar Khaganate Title: Bek / King

Overview

Joseph was the last known ruler of the Khazar Khaganate and the most historically documented of all the Bulanid kings, primarily because he is the author of the Khazar Correspondence — the extraordinary exchange of letters with Hasdai ibn Shaprut, the Jewish statesman and physician at the court of Abd al-Rahman III in Córdoba, which remains the single most important primary source on Khazar history and identity. Written around 960, Joseph's letter to Hasdai describes the origins of the khaganate, the conversion of Bulan, the Bulanid dynastic succession, the geography of the Khazar realm, and the political conditions of his own reign. It is, simultaneously, a diplomatic communication, a dynastic chronicle, and a testament of Jewish faith from a Jewish king of the steppe.

Joseph ruled a state that was still functioning and still militarily capable but was facing the most severe external pressures in the khaganate's history. The Rus under Prince Sviatoslav of Kiev launched a devastating campaign against the khaganate around 965–969, destroying Sarkel, sacking Itil, and effectively dismantling the Khazar political structure. Joseph's fate in the aftermath of these campaigns is unknown; he disappears from the sources, and the organized Khazar state disappeared with him.

Rise to Power

Joseph succeeded his father Aaron II within the Bulanid framework, inheriting the Bek position as the last in a dynastic line that had governed the khaganate for over a century and a half. His accession brought him to power at a moment of acute geopolitical crisis: the Byzantine Empire had been actively cultivating the Rus as a partner and, according to some sources, had encouraged or facilitated Sviatoslav's campaigns against the Khazars — a betrayal of the long-standing Byzantine–Khazar alliance that had been one of the structural features of the region's politics since the seventh century.

Joseph's response to this crisis combined military resistance with active diplomacy, including the correspondence with Hasdai ibn Shaprut that constitutes his legacy. He sought to make known to the Jewish world beyond the steppe that a Jewish kingdom existed on the Volga and that its king was a faithful upholder of the tradition of Israel — a message that carried both political and spiritual weight.

Rule and Achievements

• Authored the Khazar Correspondence, the most significant primary source on Khazar history, identity, and the Bulanid dynasty
• Conducted high-level diplomacy with the Jewish community of al-Andalus through his exchange with Hasdai ibn Shaprut, projecting the image of a Jewish sovereign state to the broader diaspora
• Maintained the territorial functioning of the Khazar Khaganate and its commercial systems through the opening phase of the Rus military challenge
• Resisted the campaigns of Sviatoslav of Kiev with available Khazar military forces
• Preserved the Jewish institutional framework of the khaganate through the final years of its existence
• Provided in his letter the only surviving narrative account of the Khazar conversion to Judaism and the Bulanid dynastic succession

Legacy

Joseph's legacy is defined above all by the Khazar Correspondence — a document of extraordinary historical importance that has preserved the memory of the Jewish Khazar state across more than a thousand years. Without Joseph's letter, the details of Bulan's conversion, the Bulanid succession, and the character of the Khazar Jewish state would be known only through fragmentary and often hostile foreign sources. It is through Joseph's own words that the Khazar rulers speak most directly to posterity, describing their faith, their lineage, and their conception of their place in the world.

The destruction of the khaganate by Sviatoslav's forces in the late 960s brought to an end the most remarkable experiment in Jewish political history since the ancient Israelite kingdoms. The Khazar state that Joseph had inherited — founded by Bulan's conversion, institutionalized by Obadiah, and sustained across fifteen generations of Bulanid rule — ceased to exist as an organized political entity within the decade of his correspondence with Hasdai. Scattered Khazar communities survived in the Crimea and the Caucasus for generations afterward, but the khaganate as a sovereign power was gone.

Within the Qaghan tradition, Joseph is the terminus of the Khazar chapter: the final ruler, the voice of a vanished kingdom, and the author of the document through which the Jewish steppe empire speaks to the ages. His correspondence with Hasdai ibn Shaprut inspired Judah Halevi's philosophical dialogue the Kuzari and has continued to fascinate historians, theologians, and scholars of medieval Jewish history. He stands as one of the most compelling figures in the entire history of the Qaghan tradition — a Jewish king of the steppe, defender of a civilization, and the last guardian of the Khazar inheritance.