Gleb Vladimirovich of Ryazan

Prince Gleb Vladimirovich of Ryazan was a 13th-century nobleman of Kievan Rus'. He is remembered in history as an instigator of a civil war in the Principality of Ryazan. In a bid for the throne, in 1217 he lured his brothers to a feast at Isad and executed them all, using Cuman mercenaries. Ousted by popular revolt, he was exiled to the Wild Fields and spent his old days with the Cumans.
He is a minor antagonist during the Mongol invasion of Kievan Rus' in the historical novel Batu-Khan of Soviet author V. Jan.