Sounds very much like the story about a (French?) pop-group Eiffel 65 I read somewhere. In an interview they were asked what does the number 65 stand for. They said the name was originally Eiffel, and the number came from the drafts given to the graphics designer, as somebody had written some street address on the drafts with the number 65, or something similar. By the time they discovered the mixup, the record company had already printed the album covers.
I wonder how many familiar product names were born this way?