Vladimir Olgerdovich was a son of which ruler of medieval Lithuania?
Vladimir Olgerdovich Vladimir Olgerdovich (Belarusian: Уладзімер Альгердавіч , Lithuanian: "Vladimiras Algirdaitis" , Polish: "Włodzimierz Olgierdowic" , Ukrainian: Володимир Ольгердович ; died after 1398) was a son of Algirdas, Grand Duke of Lithuania, and his first wife Maria of Vitebsk. He was Grand Prince of Kiev from 1362 to 1394. His sons Ivan and Alexander started the Belsky and Olelkovich families.
Vlad Călugărul Vlad IV Călugărul, (believed born prior to 1425 – September 1495) translated as Vlad the Monk, was the pious half-brother of Vlad III (Vlad the Impaler, or Dracula), and one of many rulers of Wallachia during the 15th century. Vlad the Monk was a contender to his brother's throne as ruler of the principality of Wallachia for many years, but he took no active part in fighting for the throne until near the end of Vlad III's lifetime.