John McVie and Christine McVie of Fleetwood Mac were married for awhile.
If you count Bruce Springsteen and the E Street Band, Bruce Springsteen and backup singer Patti Scialfa have been married for approximately 20 years.
Rick Nelson’s twin sons, Matthew and Gunnar perform together as the band Nelson. Their debut album reached #1 in 1990 and they continue to perform and record on their own label.
Ringo Starr’s son, Zak Starkey, played drums in Ringo’s All Starr Band.
Mates of State (married couple) The Watson Twins (identical twin sisters)
If we count jazz acts, Tommy and Jimmy Dorsey (brothers), Wynton and Branford Marsalis (also brothers), and Ornette and Denardo Coleman (father and son) often recorded with each other.
40 years later, the Allman Brother Band includes one of the drummers’ nephew on guitar.
I’m surprised to be the one who gets to mention two wives who famously crashed their respective husbands’ bands, for better or [del]worse[/del] worst: Linda McCartney and Yoko Ono.
The band Eisley is an all-family outfit. The members are all siblings plus one cousin – they are Stacy, Sherri, Chauntelle, Garron, and Weston Dupree. And all except one (Garron, the bassist, is single) are married to people in the music industry and have babies. I fully expect to see Eisley 2.0, featuring their kids, in about 15 years.
Shouldn’t The Everly Brothers (Don & Phil) and The Isley Brothers (Kelly, Rudy, Ernie, & Ronnie) have been mentioned before. The Isley Brothers have had the longest career in rock history, and I have met Rudy several times. We once had a lovely talk about their touring with the Beatles in 1962, and introducing Twist & Shout to John Lennon.