Władysław III of Poland (b. 1424)
Władysław III (31 October 1424 – 10 November 1444), also known as Ladislaus of Varna, was King of Poland and the Supreme Duke (Supremus Dux) of Grand Duchy of Lithuania from 1434 as well as King of Hungary and Croatia from 1440 until his death at the Battle of Varna. He was the eldest son of Władysław II Jagiełło, King of Poland and Grand Duke of Lithuania, and the Lithuanian noblewoman Sophia of Halshany.Władysław III of Varna is known in Hungarian as I. Ulászló; in Polish as Władysław III Warneńczyk; in Slovak as Vladislav I; in Czech as Vladislav Varnenčík; in Bulgarian as Владислав Варненчик (Vladislav Varnenchik); in Lithuanian as Vladislovas III (or Vladislovas Varnietis); in Croatian as Vladislav I. Jagelović.