What music is David's song (Kelly family)?

Celtic music is music from the Celts. Celts first lived in some tribal groups in central and western Europe around 1000 BC and came to England after a long migration. Today, their descendants are scattered in Ireland, Wales, northern Scotland and western mountains. Celts include Irish, Highlanders, Welsh and Cornish. Most of them are bilingual-English and their mother tongue (Gaelic or Celtic). Besides learning words or cultural relics, the most direct way is to listen to their music. Typical Celtic flavor, ancient and mature, you can hear violin, bagpipes, small harp or accordion with two bellows. In the British Isles, in the American continent, as long as there are descendants of Celtic immigrants on the land, you can find such music.