Cornerstone is the name of several groups. 1) Hardcore band form BETHEL, Connecticut, United States. 2) Austrian AOR/ Melodic Rock band. (using the ® -trademark in addition to their name) 3) Danish hard rock band. 4) Christian rock group from ELk Grove, CA. 5) funk/rock act from South Wales, United Kingdom. 6) Bluegrass group based in Ithaca, New York. 1. Hard rock band led by Scottish vocalist Doogie White (ex-Rainbow, ex-Yngwie Malmsteen) and Danish bassist Steen Mogensen (ex-Royal Hunt).