Lots of great bands mentioned. Seven Nations was the first celtic rock group I was exposed to when they used to be regulars at the Pleasanton Highland Games. I also enjoy Albannach, Brother, Wicked Tinkers, Tempest, Wolfstone, Barleyjuice and Gaelic Storm. Another group I like that I don't think has been mentioned yet is the Kilmaine Saints. They just released their 2nd album.