Ferdinand IV was made and crowned King of Bohemia in 1646, King of Hungary and Croatia in 1647, and King of the Romans on 31 May 1653. He also served as Duke of Cieszyn. Wikipedia
Born: September 8, 1633, Vienna, Austria
Died: July 9, 1654 (age 20 years), Vienna, Austria
Great-grandparents: Philip II of Spain, Charles II, Archduke of Austria, Maria Anna of Bavaria, and more
Parents: Ferdinand III, Holy Roman Emperor and Maria Anna of Spain
Grandparents: Ferdinand II, Holy Roman Emperor, Philip III of Spain, Margaret of Austria, Queen of Spain, and more
Siblings: Mariana of Austria
Aunt: Anne of Austria