For 10 points name this European royal family whose famous members include Charles IX and Gustavus II Adolphus.
This dynasty began its rule when its founder, Gustav Eriksson, successfully revolted against Christian II in 1523 and crowned himself Gustav I. Through marital connections with the last male member of the Jagiellonian family of Poland, the dynasty came to rule Poland in the person of Sigismund III in 1587. Although its Polish rule ended with the abdication of John Casimir in 1668, it continued to hold Sweden until 1818, when it was succeeded by the house of Bernadotte. For 10 points name this European royal family whose famous members include Charles IX and Gustavus II Adolphus.
This dynasty began its rule when its founder, Gustav Eriksson, successfully revolted against Christian II in 1523 and crowned himself Gustav I. Through marital connections with the last male member of the Jagiellonian family of Poland, the dynasty came to rule Poland in the person of Sigismund III in 1587.
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