Bobby Osborne and Sonny Osborne are also known as?
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. Bobby Osborne: Bobby Osborne (born December 7, 1931) is a bluegrass musician known for his mandolin playing and high lead vocals.
i don't know