Melvins are a four piece right now, the current members are Buzz Osborne AKA King Buzzo(guitar/vocals) his given first name is Roger, Dale Crover who plays drums, and the members of Big Business, Jared and Coady, who play bass and drums respectively.
The Melvins formed in Aberdeen/Montesano, WA in 1983 the founding members were Buzz, Mike Dillard (drums), and ex-Mudhoney bassist Matt Lukin. Buzz, Mike, and Matt all went to high school in Montesano. The name Melvins came from a grocery clerk at the Thriftway in Montesano where King Buzzo served as clerk and vandal. Melvin was the most hated fellow employee and they felt it to be an appropriately ridiculous name.