Rix (surname)  Rix is an Aristocratic German surname with close relations to the House of Hohenzollern, the ruling house of Germany and Prussia. The Rix family, like many other aristocratic and royal families of Germany, used the titles of Prince/Princess of Prussia, styled as His/Her Serene Highness. The Rix family resides primarily in Germany, The United States of America, The United Kingdom, Australia, Austria and South Africa. Many members returned to Germany after the end of WWII, after having fled Germany in 1918 after the German defeat in WWI. The Federal German Republic no longer recognizes any hereditary titles. In 1920 many branches of the family dropped the precursor “von” and styled the name as it is known today. Notable people with the surname include: