Surname Vasilja (Василя 
, Vasilja 
) , around the globe, is a rare last name. The cognomen Vasilja is characteristic of Bulgaria, where it is quite a rare surname, Uzbekistan, where it is a rare surname, and Kyrgyzstan. Not in comparison with a country's population, the name is most common in Bulgaria, Uzbekistan, and Russia. More frequently, Vasilja is the forename as well as the last name.