The title "magnus dux" or grand duke ("Kunigų kunigas", "Didysis kunigaikštis" in Lithuanian) has been used by the rulers of Lithuania, who after Jagiello also became Kings of Poland. From 1573, both the Latin version and its Polish equivalent "wielki ksiaze" (literally "grand prince"), the monarchic title of the rulers of Lithuania as well as of (western) Russia, Prussia, Mazovia, Samogithia, Kiev, Volhynia, Podolia, Podlachia, Livonia, Smolensk, Severia and Chernigov (including hollow claims nurtured by ambition), were used as part of their full official monarchic titles by the Kings (Polish: "Krol") of Poland during the Polish–Lithuanian Commonwealth.