@LiberalLibrarian While American football and rugby both share roots with association football , they do not directly originate from it. Association football, or soccer, is considered one of the oldest forms of football and has influenced the development of various other football codes. Rugby football, from which American football evolved, is believed to have originated from an early form of football played at Rugby School in England during the 19th century. The connection between association football, rugby football, and American football lies in their common ancestry as different variations of football that evolved from traditional folk games played in different regions. While there are similarities in terms of gameplay elements and rules, each sport has its unique characteristics and rule sets that distinguish it from the others. Overall, while American football and rugby have historical ties to association football, they have distinct origins and developments that have shaped them into the separate sports we know today.