Karl Friedrich, Prince of Hohenzollern (given names: Karl Friedrich Emich Meinrad Benedikt Fidelis Maria Michael Gerold; born 20 April 1952) is the eldest son of the late Friedrich Wilhelm, Prince of Hohenzollern and Princess Margarita of Leiningen.^[1] He became head of the Roman Catholic Swabian branch of the House of Hohenzollern upon his father's death on 16 September 2010.^[1] As the great-great-grandson of Leopold, a few Hohenzollern supporters from Spain recognize Karl Friedrich as "Carlos V".