Inspired by this thread: http://boards.straightdope.com/sdmb/showthread.php?t=433576 , I notice that there are names that were once nondescript chosen for characters in the movies that you couldn’t get away with now. In this thread, it’s mentioned that the name of Lloyd Bridges’ character in the series sea Hunt was Mike Nelson, which, of course was the name of the headwriter and later the character in Mystery Science Theater 3000
In the original Godzilla (American adaptation), Raymond Burr’s character is named … Steve Martin.
I KNOW there are others. I have a bunch on the tip of my tongue, but can’t quite recall them.