Crosby, Stills & Nash  (CSN) is a folk rock supergroup made up of David Crosby, Stephen Stills and Graham Nash.  They are known as Crosby, Stills, Nash & Young (CSNY) when joined by occasional fourth member Neil Young.  They are noted for their intricate vocal harmonies, often tumultuous interpersonal relationships, political activism, and lasting influence on US music and culture.  All four members of CSNY have been inducted into the Rock and Roll Hall of Fame twice, though Young’s inductions were for work not involving the group.  (More from Wikipedia)

 

After Cactus (initially) broke up in 1972, Jeff Beck joined with Tim Bogert and Carmine Appice in a short-lived power trio called Beck, Bogert & Appice.  A lot had happened in rock music in the two years since Jeff Beck had his motorcycle accident – Crosby, Stills and Nash for one – so the surnames sufficed to name the band.  

(April 2014)

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Drummer Michael Tegza was the only original bandmember left when he reinvented the band H. P. Lovecraft under the name Lovecraft and released an album called Valley of the Moon in 1970.  Joe Viglione, writing for Allmusic says of this album:  “For this 1970 Reprise release, they are dubbed Lovecraft and have abandoned the psychedelic Jefferson Airplane sound for a progressive Crosby, Stills & Nash-meets-Uriah Heep flavor.”  

(June 2014)