OopsOnce you start looking at punk bands, it's so common that the list could be endless.
Lux, Ivy, Crocus, Iggy, Sickie, Tesco, Mono, Jello, Exene, Ari, Derf, Rat, Siouxsie, Cheetah, Epic, Tomata, Poly, Tory... on and on.
James Brown famously had three Collins brothers in his band: Catfish, Cheese, and Bootsy.
Tommy Erdepyi and John(ny) Cummings used their real first names in the Ramones. All of the later substitute Ramones did, too, except for temporary fill-in Elvis Ramone (Clem Burke). Joey was Jeff, DeeDee was Doug.