Ph.D. (Phillips, Hymas and Diamond)

Ph.D. are a British group best known for their UK Top 10 hit "I Won't Let You Down" in April 1982, although the song had been a hit the previous year throughout Europe. The band took its name from the initial letters of its three members' surnames; Phillips, Hymas and Diamond. The name was written so as to be a visual pun on the letters denoting a degree of the same name.

source: Wikipedia