Family name Kosobutskii (Kosobutskii 
, Кособутский , Кособуцкий 
) , globally, is a rare cognomen. The surname Kosobutskii is characteristic of Belarus, where it is quite a rare surname, Russia, where it is a rare surname, and Kazakhstan, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kosobutskii | Belarus, Russia, Ukraine |
| Кособутский | Belarus, Russia |
| Кособуцкий | Belarus, Russia, Kazakhstan, Ukraine |
Кособутський, Кособутцкии, Кособуцкии, Кособуцкій, and Кособуцький