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Family name Ubaydullayev (Убайдуллаев
, Убаыдуллаев
, Ubaydullayev
) , worldwide, is quite a rare cognomen. The last name Ubaydullayev is habitual in Kyrgyzstan, where it is quite a rare surname, Azerbaijan, and Uzbekistan. Not in comparison with a country's population, it is commonest in Uzbekistan, Russia, and Azerbaijan.
| VARIANT | COUNTRY |
|---|---|
| Убайдуллаев | Kazakhstan, Uzbekistan, Russia, Kyrgyzstan, Azerbaijan |
| Убаыдуллаев | Russia |
| Ubaydullayev | Turkey, Uzbekistan, United States, Russia |