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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 | Uzbekistan, Kazakhstan, Russia, Azerbaijan, Kyrgyzstan |
| Убаыдуллаев | Russia |
| Ubaydullayev | Uzbekistan, Russia, Turkey, United States |