Surname Nadeikin (Nadeikin 
, Надеикин , Надейкин 
) , all around the world, is a rare last name. The last name Nadeikin is habitual in Russia, where it is a rare surname, Belarus, and Kazakhstan, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Nadeikin, Надеикин | Russia |
| Надейкин | Russia, Kazakhstan, Belarus |