Peter married Grand Duchess Olga Alexandrovna ROMANOV in Jul 1901. Olga (daughter of Alexander III Alexandrovich ROMANOV, Tsar Of Russia and Tsarina Dagmar "Marie" Of Denmark) was born on 1 Jun 1882; died on 24 Nov 1960 in East Toronto, Ontario, , Canada; was buried on 30 Nov 1960 in York Cemetery, Toronto, Ontario, Canada. [Group Sheet] [Family Chart]