Surname Сейдин (Sejdin 
, Сейдин 
, Seydin 
) , in the world, is a rare family name. The family name Сейдин is habitual in North Macedonia, where it is quite a rare surname, Nicaragua, where it is a rare surname, and Honduras. Likewise, Сейдин is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sejdin | Germany, North Macedonia, Greece, Albania, Croatia |
| Сейдин | Kazakhstan, Kyrgyzstan |
| Seydin | Peru, Honduras, United States, Nicaragua |
| Seidin | Nigeria, Nicaragua, Kazakhstan, India, Honduras |