The Boys (And Girls) in the Band

The Moody Blues
Maddy, Liam, Rick, Julian, Jesse and Spud

Steeleye Span
Chad, Joe, Mike

Did you forget Sammy?

Nope, no Sammy.

Okay… because Chad Smith, Joe Satriani and Michael Anthony + Sammy Hagar made the band Chickenfoot.

Interesting, but this isn’t Chickenfoot.

The Chad Mitchell Trio?

Sounds like it, since that was the line-up for most of their albums. Factoid: When Chad Mitchell left the group, they kept the name…and replaced him with then-unknown John Denver.
Mike, John, John and Orville.

[Yes, the Chad Mitchell Trio is correct.]

Michael Nesmith and The First National Band
Kevin, John, John, Jordan, and Mike (formerly Mike)

Dream Theater
Neil, Tim, Jean-Paul, and Dan.

Clutch

Scary, Sporty, Baby, Ginger & Posh

Spice Girls

And playing off that: David, Buddy, Michael, Ronny and Johnny

New Riders of the Purple Sage
Waylon, Willie, Kris & Johnny

The Highwaymen
Timothy, Geoff, Theodore and Kyle

Fuck (the band, not the sex act)

George, Roy, Mikey & Jon

Culture Club

Dennes, Mike and George

The Minutemen

Thomas, Charles, John, James and Dennis

Styx

Michael, Joe, Paul, and Topper

The Clash

Gloria, Emilio, Juan and Enrique