Talk:Big Hero 6/@comment-25552823-20141126140235/@comment-3444885-20141126153053

As far as in-universe, it was probably the media that gave them that name. Notice how they never say the name themselves, not even once, but then you'll see in the news in the credits and it refers to them as "Big Hero 6". Their identities are secret (somehow...), so the media just scrambled together a name to call them by so they don't have to say "those one guys".