Surname Seguei (Сегей 
, Сегеи , Seguei 
) , in the entire world, is a very rare cognomen. The surname Seguei is habitual in Kyrgyzstan, where it is a very rare surname, Spain, and Russia, where it is an extremely rare surname. Predominantly, Seguei is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Сегей | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Сегеи | Russia |
| Seguei | France, Spain, Slovakia, United States |