Gael, for one, is a term used to refer to a group of people who share a common Celtic heritage. This includes the Irish, Scots, Manx, and Welsh. The term 'CELT' is derived from the Greek word for 'BARBARIAN' and was used to describe the people living in the British Isles during the Iron Age. The Celts were known for their art, music, and literature, and their influence can still be seen in many parts of Europe today.