1) Russian surname 
Vlasov or Vlasoff (Вла́сов; masculine) is a common Russian surname formed from the first name Vlas or from the Greek Βλάσιος (Blaise) meaning simple. There is also a version that the family name can come from the Slavonic vlas meaning haire. The feminine form of the surname is Vlasova (Вла́сова). The surname is shared by: ......