Prince (Knyaz) Stanislav of Kiev was the last Kiev ruler of the Rurik Dynasty. Kniaz’ or knyaz is a word found in some Slavic languages, denoting a Nobility rank Kiev, also known as Kyiv ( Ukrainian:, Kyiv, ˈkɪjiw Russian:, Kiyev; see also Cities' alternative names) is the The Rurik Dynasty was the ruling Dynasty of Kievan Rus', the successor Russian principalities and early united Russia, from 862 to 1598 His reign ended in 1321 after the allied force of Stanislav and several other princes was defeated by Gediminas near Kiev at what became known as the Battle on the Irpen' River. Gediminas (ca 1275 – winter 1341 was the Monarch of medieval Grand Duchy of Lithuania with the title lt didysis kunigaikštis (вялікі князь The Battle on the Irpen' River (as referred to in historic Chronicles occurred in 1321 between the armies of Gediminas, the Grand Duke of Lithuania