Hmm, that's an interesting question. The term "folks" is actually a colloquial way of referring to people in general, without any specific origin in folklore. It's just a shortened version of "folk," which is a term that has been used for centuries to refer to a group of people who share common cultural or ethnic traditions. So, in short, the term "folks" has a long history of usage in English and doesn't have a specific origin in folklore.