"None of which belong or are made by 'the folk' but are composed or belong to somebody"

I'm sure I'm going to regret this, but I find it hard to imagine songs not being composed (or perhaps better expressed as "originated") by somebody - the idea of some form of spontaneous emergence seems unlikely.

Over time, they evolve and are accepted into the common culture, but I'm sure the majority start off with one person or perhaps a very small "few people",