Gleb Vladimirovich of Murom
Gleb Vladimirovich (baptized David, c. 987–1015), a son of Vladimir the Great, was prince of Murom from about 1013 and younger brother of Boris of Rostov. After Vladimir's death in 1015 their half-brother Sviatopolk seized Kiev and had Boris murdered, then summoned Gleb from Murom.
Sviatopolk's men overtook him near Smolensk despite a warning from Yaroslav the Wise, and on 9 September 1015 his own cook cut his throat on their order. In 1019 Yaroslav buried him beside Boris, and the Church canonized the brothers as Saints Boris and Gleb.