how about The Cuckoo (the US version that is: ie "...she never hollers coocoo till the 4th day of July"). or Shady Grove. or Buckeye Jim.

I'm thinking of those American old-time folksongs that are like cut-n-paste collages of remembered verses of other songs. With verses that don't really belong. Greil Marcus analyses them well in his 'Invisible Republic' book.