Jani Beg
Jani Beg (died 1357) was khan of the Golden Horde from 1342. A son of Öz Beg Khan, he eliminated his elder brother Tini Beg and was elected with his mother Taydula Khatun's support. He intervened in the Russian principalities, backing Moscow's princes, and Russian chroniclers called him 'the good tsar'.
His quarrel with the Italian colonies led to the long siege of Kaffa, traditionally linked to the Black Death's arrival in Europe. In 1357 he took Tabriz and died on the way home; contemporaries suspected that his son Berdi Beg ordered his murder.