The Jagiello royal House of Lithuania held the crown of Poland since the first ruler Wladislaw Jagiello received it via his wife Hedwig in 1383.
He was elected king of Poland in 1587.
In 1592 Sigismund III married the Austrian archduchess Anna. They had a son, who later ruled as Wladislaw IV Sigismund. In the same year his father died and he was offered the Swedish throne; he was crowned in 1594.
His first wife Anna died in 1598, and he married her sister Constantia in 1605. Among their several sons were:
John Casimir 1609 - 1672 Johan Albert 1612 - 1634 Karl Ferdinand 1613 - 1655 Alexander Karl 1614 - 1635