Jani Beg
In 1341, shortly after the dismissal of the Muscovite coalition army, Algirdas (then prince of Vitebsk, allied with prince of Smolensk) besieged Mozhaysk. News of the death of Gediminas forced Algirdas to quit the campaign before Simeon could arrange a military response. Uzbeg Khan, Simeon's sovereign, died soon afterwards; his successor, Jani Beg, secured the control of the Horde through killing his brothers. Simeon and Theognostus had to travel to the Horde again. Jani Beg reassured Simeon in his rights and let him go, but kept Theognostus hostage to extort money from the church; eventually, Theognostus was released for 600 roubles.