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 | United States, Israel, Romania, Russia, Moldova |
| Vasilyev | United States, Lithuania, Israel, Russia, Moldova |
| Vasiljev | Latvia, Serbia, United States, Lithuania, Russia |
| Василйев | Russia |