Indeed, Guest. But I don't think even that would make it folk. I bet not many reading this could tell you offhand who wrote, say, a 30s standard like "We're In The Money", which I bet you can all hum on hearing the title... Hammerstein? Porter? Berlin? Johnny Mercer? Kern? Nope; none of them. In fact, I happen to remember it was one of the hundreds of songs with music by Harry Warren; not a name to conjure with, but google him & you'd be surprised who he worked with & what familiar tunes he was responsible for. Words were by Al Dubin in this case -- & likewise with him.

But it still isn't 'folk', is it? For all that...

≈M≈