Belarus is a initialism of bruk.
As a proper noun belarus
As an initialism bruk is
(economics) belarus, russia, ukraine and kazakhstan.
Other Comparisons: What's the difference?
(en proper noun
A country in Europe. Official name: Republic of Belarus (Belarusian: ).
* Byelorussia (obsolete)
* White Russia (obsolete)
* Byelorussian SSR
(economics) Belarus, Russia, Ukraine and Kazakhstan