Well, Mes, good for you! You picked the family of jazz musicians that would probably get my vote. However, we can't forget the Marsalis family (even if we want to): Wynton, Branford, Delfeayo, and their father Ellis; the Redmans (Dewey and Joshua); the Freemans (Von and his son Chico); or the Brubecks (father Dave, and his 3 sons). We could also include the Brecker brothers; the Cuban father/son jazz pianists, Bebo and Chucho; the Cash family singers (Johnny, his wife, and her entire musician side of the family); etc.
And to wind up with a really obscure choice, I'll throw in my first wife's uncle and aunt, Joe and Rose Lee Maphis, two of the finest country musicians to come out of western Maryland. Joe was a superb guitarist, and his wife Rose Lee was an outstanding singer. And for those who say they never heard Joe Maphis before, I refer them back to the old TV series, "Bonanza" (with Pa, Hoss, Little Joe, Adam, Hop Sing, etc.). That opening musical theme for the show featured Joe Maphis on guitar -- you remember: dum-dada-dum-dada-dum-dum....