Ferdinand II, Archduke of Austria

Ferdinand II, Archduke of Further Austria was ruler of Further Austria including Tirol. The son of Ferdinand I, Holy Roman Emperor, he was married to Philippine Welser in his first marriage. In his second marriage to Anna Juliana Gonzaga, he was the father of Anna of Tyrol, the wouldbe Holy Roman Empress.

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 . 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 Frst zu Burgau.

Source: Wikipedia