What's the real last name of Janne?

ukstin

I Survived the Lake Bodom
Feb 6, 2002
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www.bodomnight.cjb.net
I have seen in many places two differents ways to write the lastname of Janne, in many there are 'Wirman' and in others 'Warman'.

What's the real true lastname of this fantastic keyboard player?
 
hehe... I didn't know that... I thought it was like randomly chosen, you know... ;)
But that's cool, changing one letter and having a cool Nickname... :)