Сигизмунд Кейстутович
Sigismund Korybut was among the commanders in the Battle of Pabaiskas on the side of his uncle Švitrigaila on 1 September 1435. His army was decisively defeated by Sigismund Kęstutaitis' forces. Sigismund Korybut was wounded during the battle, however he fought till the end. According to Jan Długosz, the cause of his death was severe infection of his wounds ("extremo mortis horrendae supplicio").