Virtanen (englanniksi)

In 2010 (s: surname)
most common in Finland .[http: (s: surname / barely ahead of Korhonen)
verkkopalvelut.vrk.fi (s: surname)
Nimipalvelu (s: surname)
nimipalvelu_sukunimitop.asp?L=3 "Most common surnames"] (s: surname)
[http: (s: surname)
default.asp?L=3 Finnish Population Register Center] (s: surname / English version)
as of March 2010.< (s: surname)
ref> (s: surname)