Cognomen Василйев (Vasiliev 
, Vasilyev 
, Vasiljev 
) , all around the world, is a common last name. The last name Василйев is characteristic of Moldova, where it is quite a common surname, Monaco, and Latvia (explore the name in all countries). Not in comparison with a country's population, it is commonest in Russia, Moldova, and Serbia. Very seldom, Василйев is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Vasiliev | Russia, Romania, Israel, Moldova, United States |
| Vasilyev | Russia, Israel, Moldova, Lithuania, United States |
| Vasiljev | Russia, Serbia, Lithuania, United States, Latvia |
| Василйев | Russia |