In 1970 I wrote a song "My Green Valleys" which was used as a filler song for an album "Brannigan's Boys" (an Irish/Canadian pub band, of which I was the banjo player)
Lo and behold the venerable Wolfetones recorded it, as well as the Irish Rovers.
Since then it has been recorded over 30 times by various artists(mainly in the British Ilses)
Regretfully on more than one occasion it has been credited as traditional. Obviously these people havent gone through the proper licencing procedures and ultimately as the writer, I lose.
Ive even had people suggest I couldnt have possible wrote the song, as they heard their grannys singing it to them in their cradles.

Its flattering to have had so many artists cover this song over the years, yet frustrating when the above happens.
In spite of the fact it was written for a Irish pub band, by a Canadian, it succeeded in sounding traditional enough for the purpose intended at the time.
Cheers, Glen