Family name Лосьев (Losev 
, Лосьев 
, Losiev 
) , in all the world, is quite a rare surname. The surname Лосьев is characteristic of Latvia, where it is quite a rare surname, Belarus, and Lithuania. In absolute terms, it is commonest in Russia, Belarus, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Losev | Russia, Belarus, United States, Latvia, Lithuania |
| Лосьев | Kazakhstan, Russia, Ukraine |
| Losiev | Estonia, Poland, Spain, Ukraine |