James Joseph McGuinn. Leader of The Byrds. His Rickenbacker 12-string guitar and the group's modal vocal harmonies (sung with Gene Clark and David Crosby) became a signature sound of folk-rock. He had an interest in gadgets, electronics, and flight - his name "Roger", given to him by his Subud guru, evoked both amateur radio and airplane-pilot jargon, and was appropriate. Nowadays, he's a Christian, and he's more likely to have an acoustic 12-string in his hands.

http://mcguinn.com