Bobby Osborne and Sonny Osborne are also known as?
Sonny Osborne: Sonny Osborne (born October 29, 1937 in Hyden, Kentucky) is a bluegrass singer and five-string banjo player. Sonny Osborne:  A master of the style developed by Earl Scruggs, called the "Scruggs style", he is best known for his collaboration with his brother Bobby Osborne as the Osborne Brothers.
i don't know