| Osiko Viacheslav Academic Russia Academy of Sciences, Lenin Prize winner, Director, Scientific Center of Laser Materials and Technologies IOFAN, Doctor of Physical and Mathematical Sciences, Professor |
| Obolensky Andrey Counselor Russia Academy of Architecture and Building Sciences, head of the integrated workshop? 12 to the design of the church of Christ the Savior and the buildings Foreign Ministry Management ' |
| Oleg Tolkachev Doctor of Physical and Mathematical Sciences, Member of the International Informatization Academy, Member of the Academy of Art, First Deputy Prime Minister of the Moscow Government. |
| Oleg Alexandrovich Troyanovsky Lenin Prize laureate, Ambassador Extraordinary and Plenipotentiary, President of the United Nations Association, an honorary Doctor of Diplomatic Academy of the MFA of Russia |
| Ordovsky-Tanaevsky Blanco Rostislav V. CEO 'Rostik International' |
| Obolensky Andrey Counselor Russia Academy of Architecture and Building Sciences |
| ORLOV Mikhail Fedorovich Decembrist |
| ORLOV Alexei Fyodorovich Military and State. figure |
| Orlov Alexey military leader, a close associate of Catherine II |
| OLEG Jaroslawicz Nastasich Prince Galitsky |
| Oleg Svyatoslavich Prince of Chernigov |
| Oleg Svyatoslavich Prince of Novgorod-Seversky |
| Oleg Svyatoslavich Duke of Chernigov |
| Oleg Svyatoslavich Drevlyane Prince |
| Oleg Romanovich Prince of Bryansk |
| Oleg of Novgorod Prince of Novgorod, Prince of Kiev |
| OSTROVSKY Nikolai Writer |
| Oster Gregory Bentsionovich Children's Writer |
| Olesha Yury Karlovich Writer |
| ODOEVTSEVA Irina Poet, writer |
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