On 4 May 1938, Grand Duchess Kira Kirillovna of Russia, daughter of Grand Duke Kirill Vladimirovich of Russia, Head of the House of Romanov, and Princess Victoria Melita of Saxe-Coburg and Gotha, married Louis Ferdinand, Prince of Prussia, who would become the Head of the House of Hohenzollern, in a Lutheran ceremony. They were second cousins once removed.