Gregg Allman was one of the founding members of the Allman Brothers Band, a rock and blues band formed in 1969. Gregg was the lead vocalist and keyboardist for the band, and his brother Duane Allman was the lead guitarist. Gregg's name can be found in the crossword solution as 'GREGG' with 5 letters, and Duane's name can be found as 'DUANE' with 5 letters. Both Gregg and Duane were integral members of the Allman Brothers Band and are considered to be two of the most influential musicians of the 20th century.