Name
- Osten-Sacken, Nikolai Dmitrievich, Count1
- Osten-Sacken, Robert Romanovich, Baron, Russian diplomatist1
- Ostrovsky, Mikhail Nikolaevich, Russian Minister of Domains1
- Otho, King of Greece1
- Otto, King of Greece1
- Outrey, M., Madame; of the French Embassy at Constantinople1
- Pankratiev, V., Princess, née Gorchakov1
- Paskevich, Irina, Princess1
- Pavlov, Aleksandr, household serf1
- Pellerin, A., of Paris1
- Penelope Caroline, Principessa di Capua1
- Pepin Lehalleur, Mathilde, Madame1
- Perié, of Paris1
- Perovsky, Count1
- Petaski, M.1
- Peterson, Karl Aleksandrovich?, of the Russian Foreign Office1
- Petit de Baroncourt, brother of Jeanne Valerie Louise Petit de Baroncourt afterwards Onu1
- Petiterville, Robert, Vicomte, of the French Embassy, Constantinople1
- Petty-Fitzmaurice, Edmond George, alias Lord Edmond Fitzmaurice, Baron Fitzmaurice, politician and historian, 1846-19351
- Picq, Auguste1