Surname Semagin (Семагин 
, Semagin 
) , globally, is quite a rare last name. The cognomen Semagin is habitual in Russia, where it is a rare surname, Kazakhstan, and Belarus, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Семагин | Kazakhstan, Russia, Belarus |
| Semagin | Russia, United States |
| valeriĭ anatolʹevich semagin (b. 1951) |
|