There are only four Irish folk songs:
1. I had too much to drink and I regret nothing
2. I met a fair bonny lass and she was bonny and fair
3. We will fight the British for ever and ever and ever and ever and
4. I have left Ireland and I shall never be happy again
I’ll admit that some of these like Rocky Road to Dublin are a big stretch but they’re popular enough that I felt that they should be on here anyway.