Two points: 1. Just because their *names* are used interchangeably doesn't mean the *characters* are interchangeable; and 2. Even if Santa and FC are the same person (and I'm not conceding that), it doesn't follow that they don't deserve separate articles (as per the Jehovah/Yahweh/Allah analogy above). Is there some WP guideline that we're violating by having both articles?