My real name is Frank. Ralphie boy (actually Ralph) is a nickname that I acquired about eight years ago when we bought our house. My next-door neighboor, who has since moved started calling me Ralph one day for no apparent reason. I originally introduced myself as Frank but for some reason, he thought I was Ralph.
Best part of the story is that after a few months of this, I finally told him that my name was Frank. He called me Frank for about a week or so and then went back to Ralph. Once my friends heard this story (and witnessed a "hello Ralph"), they started calling me Ralph.
I'm also a Honeymooner's fan, so I decided to go with Ralphie boy.