He was originaly gonna be the new member of the Freddy Fazzbear's pizza's band but he didn't make it duo to being "Too dangerous" as Fazzbear entertainment said literally after only one Frederick animatronic was made cuz of the sharp teeth,nails and broke a ball made out of material strong as bones when they tested if he could interact with people without harming them.He was called like that because the only one ever made was made in the UK , Fazzbear entertainment let the people who made him to do whatever they want after the test and told'em to not tell anyone bout it's existence . So as a joke they called him Frederick as a British version of Freddy's name and so that's how he got the name. Now he's just kept in a museum made by a Freddy's pizza fan in Florida.

And now I'll explain why I gave hime this na- it's cuz of the memes. I gave him the name because one of those "Oh good heavens! It's Frederick Bear The Third!" memes you might have seen.