Probably a variant of ‘Lasser’. Come on guys, you know there’s a thing called Google? 
Well I now have a sudden inclination to change my name to Friedo Codemonkey.
Which is good, because last week I was sure I was going to change it to Crazy Joe Davola. I just like the way it sounds. Joe Davola. It’s got rhythm. Plus the “Crazy” at the beginning gives it real class.