Credit: Parents / Brianna Gilmartin Do you want your baby to have a name that reflects Celtic heritage? These Celtic baby names come from Ireland, Scotland, Wales, England, and areas of northern Spain. Pronunciation and spelling can be especially tricky for English speakers who don't also speak a Celtic language. The Celts were European tribes who occupied much of Europe north of the Alps in the Iron Age and settled in the British Isles in the fourth to second centuries BCE.