If Liebestraum is the tune I think it is, it is what John McCutcheon (or whoever) set "John o' Dreams" to.

This was probably more my boo boo (or subconscious rebellion) but when once when I played a park -- up until then a regular thing -- I had all adults and two very bored 10-ish boys in one set. I played what I knew they would like -- you know: "George Washington was a fine young man, a lie he'd never tell -- but when he chopped that cherry tree down his father gave him -- Hallelujah!" You guessed it; the grandmother in charge complained and I haven't played there since. Oh well.