Family name Alvarus (Алваро 
, Альваро , אלברו 
) , throughout the world, is a very rare cognomen. The surname Alvarus is characteristic of Armenia, where it is a rare surname, Israel, where it is a very rare surname, and Russia, where it is an extremely rare surname. More prevalently, Alvarus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Алваро | Armenia, Ukraine, Russia |
| Альваро | Ukraine, Russia |
| אלברו | Israel |
| Alvarus | United States, Brazil |