“Arthur Kenneth Blazkowicz, became a television talk show personality in Milwaukee. For show biz purposes, Arthur changed his last name to Blaze.” [Source: Apogee FAQ]
In addition to changing his last name, I decided to change Keen’s dad’s first name too since “Arthur” sounded too formal for someone with the last name “Blaze.” The wording in the FAQ seems vague as to whether he had his name changed legally, especially since it says Billy’s full name is William Joseph Blazkowicz II and he just “signs his grade school homework, B. Blaze.” So I figured Arthur/Archie kept his legal name, and just uses the stage name for his television persona. And really, if he’s this much of a jerk on TV, that’s probably a smart move.