Irish pipes are a form of bagpipe. There is also an Irish flute. A visitor to my B post alerted me to a bouzouki used in Irish music. Sure enough there is an Irish bouzouki, although the original version appears to be Greek. It is a stringed instrument.
Ireland has a long tradition of folk music.
I have learned from Wikipedia that certain percussion instruments are classed as idiophones.
If you can think of any other Instruments for this letter, please leave a comment!