When a company has created a highly recognized brand name, it only makes sense to use that brand to sell additional products. Successful brand extensions (as they're called in the marketing biz) are usually into similar markets: like Coke launching Diet Coke.
Sometimes, however, companies try to push their brands into markets that are completely different, so different that they makes you wonder whether the marketers responsible were maybe on drugs or something.
Usually these insane brand extensions fail miserably but occasionally (very occasionally) they pay off. Here's an infographic (courtesy of Plumbworld) containing the most heinous extensions of all time, including two that beat the odds.