Surname Дайлов (Daylov 
, Дайлов 
, Dailov 
) , worldwide, is a rare family name. The surname Дайлов is habitual in Bulgaria, where it is a rare surname, Kazakhstan, and Belarus, where it is a very rare surname. Measured by absolute frequency, it is commonest in Bulgaria, Kazakhstan, and Ukraine. Very seldom, Дайлов is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Daylov | Spain |
| Дайлов | Kazakhstan, Russia, Belarus, Bulgaria, Ukraine |
| Dailov | Germany, Russia, Bulgaria |
| Dajlov | Germany |