| Peter Friedrich Georg von Holstein-Gottorp | |
| B: | 21 Nov 1868 |
| Saint Petersburg, Russia | |
| D: | 11 Mar 1924 |
| Biarritz, Pyrenees-Atlantiques, Aquitaine, France | |
| Olga Aleksandrovna Romanov |
| Olga Aleksandrovna Romanov | |
| B: | 13 Jun 1882 |
| Peterhof Palace, St. Petersburg, Russia | |
| M: | 27 Jul 1901 |
| D: | 24 Nov 1960 |
| Toronto, Ontario, Canada | |