Surname Якубоуски (Якубоуски 
, Jakubouski 
, Yakubouski 
) , globally, is a very rare family name. The surname Якубоуски is habitual in Estonia, where it is a rare surname, Belarus, and Brazil, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Brazil, Belarus, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Якубоуски | Russia |
| Jakubouski | United States, Brazil, Argentina |
| Yakubouski | Estonia, Belarus, Argentina |