Surname Улусой (Ulusoy 
, Улусой 
, Ulusoi 
) , around the globe, is a common family name. The cognomen Улусой is habitual in Turkey, where it is quite a common surname, Cyprus, where it is quite a rare surname, and Bosnia and Herzegovina. In absolute terms, it is commonest in Turkey, Germany, and Azerbaijan.
| VARIANT | COUNTRY |
|---|---|
| Ulusoy | Turkey, Azerbaijan, Germany, Austria, France |
| Улусой | Kyrgyzstan, Russia, Ukraine |
| Ulusoi | Kazakhstan, Georgia |