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Cognomen Guseyn (Гусейн
, Гусеин
, Guseyn
) , throughout the world, is a rare last name. The cognomen Guseyn is characteristic of Azerbaijan, where it is quite a rare surname, Kyrgyzstan, where it is a rare surname, and Kazakhstan. Measured by absolute frequency, it is the most numerous in Azerbaijan, Russia, and Kazakhstan. More frequently, Guseyn is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Гусейн | Ukraine, Kazakhstan, Russia, Poland, Azerbaijan |
| Гусеин | Ukraine, Kazakhstan, Russia, Azerbaijan, Kyrgyzstan |
| Guseyn | Russia, France, Azerbaijan, United States |