Archduke Ferdinand II.
Archduke Ferdinand of Austria was the second son of Ferdinand I, Holy Roman Emperor and Anna of Bohemia and Hungary. He was a younger brother of Emperor Maximilian II. At the behest of his father, he was put in charge of the administration of Bohemia in 1547. He also led the campaign against the Turks in Hungary in 1556.
In 1557 he was secretly married to Philippine Welser, daughter of a patrician from Augsburg, with whom he had several children. The marriage was only accepted by Emperor Ferdinand I in 1559 under the condition of secrecy. The children were to receive the name "of Austria" but would only be entitled to inherit if the House of Habsburg became totally extinct in the male line (See also: morganatic marriage). The sons born of this marriage received the title Margrave of Burgau, after the Margraviate of Burgau, an ancient Habsburg possession in Further Austria. The younger of the sons, who survived their father, later received the princely title of Fürst zu Burgau.