Ferdinand IV (8 September 1633--9 July 1654) was born in Vienna, the eldest son of Ferdinand III, Holy Roman Emperor, and his first wife, Maria Ana of Spain.
Ferdinand IV (8 September 1633--9 July 1654) was titular King of the Romans, King of Hungary, and King of Bohemia. He was born in Vienna, the eldest son of Ferdinand III, Holy Roman Emperor, and his first wife, Maria Ana of Spain.