Family name Deikun (Deikun 
, Деикун , Дейкун 
) , in all the world, is quite a rare surname. The cognomen Deikun is habitual in Eastern Europe, particularly Belarus, where it is quite a rare surname, Ukraine, and Russia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Deikun | Russia, Germany, United States, Belarus, India |
| Деикун | Russia |
| Дейкун | Russia, Kazakhstan, Ukraine, Kyrgyzstan, Belarus |
| lidiya deikun (b. 1889) |
|