Jean-Guillaume de Neubourg-Wittelsbach
Johann Wilhelm, Elector Palatine, Anna Maria Luisa's spouse, successfully requisitioned the dignity "Royal Highness" for the Grand Duke and his family in 1691, despite the fact that they had no claim to any kingdom. Cosimo frequently paid the Holy Roman Emperor, his nominal feudal overlord, exorbitant dues, and he sent munitions to the emperor during the Battle of Vienna.