QUESTION 384 g: Ten Lychees make quite a Stain!

LAST QUESTION OF THE THEME ROUND. By now, it should have become dreadfully obvious.
I expect EVERYBODY to crack it now.

He was born in Wilfersdorf, in what is now Lower Austria. During the war of Spanish succession, he went to Spain, where he was the Chief Intendant and Prime Minister of the Archduke Karl, who became Emp. CHarles Vl after the sudden death of his brother in 1711. X returned to Vienna for Charles's coronation. He was the Imperial Chief Intendant and Chairman of the Secret Council until he died in 1721.

In 1719, Charles VI created the new principality of _____ from the domains of Schellenburg and Vadz, which were both held by the ______ family. This was done so that X could be admitted to the Reichstag, which required that all members had land that was subordinate only to the Emperor himself (as opposed to land held in fief by higher nobles). Thus, X became the first Prince of ______.