My Grandfather died in 1965, aged 85. His family were Irish tinker/gypsy in origin. I would think he had the tune from being a kid.

Sounds to me like an old fiddle tune. I imagine my Grandad and his mates apropriated it, or what they could remember of it He worked as a miner from the age of twelve. he knew lots of songs, and I can't recollect liking any of them.