Sigismund III Vasa (also known as Sigismund III of Poland, , , English exonym: Sigmund; 20 June 1566 – 30 April 1632 N.S.) was King of Poland and Grand Duke of Lithuania, monarch of the united Polish–Lithuanian Commonwealth from 1587 to 1632, and King of Sweden (where he is known simply as Sigismund) from 1592 as a composite monarchy until he was deposed in 1599. He was the son of King John III of Sweden and his first wife, Catherine Jagellonica of Poland.