I'm amazaed so many people are suprised by this? There was an original game called football, which pretty much had no rules, just get the "ball" to the other end. Then posh people introduced rules, and they disagreed, making Rugby Fottball, and Soccer Football. Rugby later slpit to union and League. Each of the colonists developed their own type. Hence Aussie Rules and American Football.
Most European Countries reffer to it as football though, and as vastly more popular sport, I'm gonna have to side against the soccer