Cognomen Iakubovskii (Якубовский 
, Iakubovskii 
) , all over the world, is quite a common family name. The last name Iakubovskii is habitual in Belarus, where it is quite a common surname, Russia, where it is quite a rare surname, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Якубовский | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Iakubovskii | Russia, Georgia |