Prince Henry of Prussia (1862–1929) became the club's patron. Henry was interested in motor cars as well and supposedly invented a windshield wiper and, according to other sources, the car horn. In his honor, the "Prinz-Heinrich-Fahrt" (Prince Heinrich Tour) was established in 1908, like the earlier Kaiserpreis a precursor to the German Grand Prix. Henry and his brother William gave patronage to the Kaiserlicher Automobilclub (Imperial Automobile Club). Henry also was an early proponent of introducing submarines and airplanes. He had merchant ships converted into seaplane tenders for operations in the Baltic Sea. Henry respected his brother, but this attitude was not returned in the
Prince Friedrich Wilhelm of Prussia Potsdam to Princess Agatha of Hohenlohe-Schillingsfürst (1888–1960), daughter of Victor II, Duke of Ratibor, and his wife, Countess Maria Breunner-Enkevoirth. They had four daughters: Prince Friedrich Wilhelm of Prussia Prince Friedrich Wilhelm of Prussia (; 12 July 18809 March 1925) was a member of the House of Hohenzollern, great-grandson of Frederick William III of Prussia. Friedrich Wilhelm was born at Kamenz Palace in Kamenz, Kingdom of Prussia, (now Kamieniec Ząbkowicki, Poland) youngest child of Prince Albert of Prussia (1837–1906), (son of Prince Albert of Prussia and Princess Marianne of the Netherlands) and his wife, Princess Marie of Saxe-Altenburg (1854–1898), (daughter