*Carmine and Vinny Appice
Now this is getting difficult without trying and failing to make puns...
So, these are a bit of a stretch, maybe:
*Randy California (solo) and Ed Cassidy (solo), not siblings, but...
*Dweezil and Moon Zappa, absenting certain Zappa Family collaborations.
*King of Swing, Benny Goodman and Harry Goodman, Jazz bassist with Gene Krupa and Allan Reuss
*The Marx Brothers (ensemble) and Harpo Marx (solo, sorta pulled out the air, for real)