Family name Смайлович (Smailovic 
, Смайлович 
, Smailovitch) , in all the world, is quite a rare cognomen. The last name Смайлович is habitual in Southern Europe, particularly Bosnia and Herzegovina, where it is quite a common surname, Montenegro, where it is quite a rare surname, and Serbia. Measured by absolute frequency, it most frequently occurs in Southern Europe, particularly Bosnia and Herzegovina, Serbia, and Croatia.
| VARIANT | COUNTRY |
|---|---|
| Smailovic | Serbia, Croatia, Germany, Bosnia and Herzegovina, Montenegro |
| Смайлович | Russia, Kazakhstan |
| Smajlović | Croatia, Slovenia, United States, Germany, Bosnia and Herzegovina |
Smailovich, and Smajlovich