- Real name
- David Troy Sommerville
- October 2, 1933
- July 14, 2015
- Co-founder and lead singer of The Diamonds under the name David Sommerville. From 1961 to 1967, under the name David Troy, he worked as a solo act, marketing himself as a folksinger. Returning to "Sommerville", Troy joined The Four Preps in 1967. In 1969, The Four Preps disbanded, and Sommerville and Bruce Belland worked for some five years as a comedy/music act known as Belland & Sommerville. In 1988, Sommerville returned to the revived Four Preps as lead singer and worked with the group another 18 years.
- Member of
The Diamonds Lead vocals (1953-1961)
The Four Preps (1966-1969) (1989-1996)