Neat list. Stan Love (NBA) is the brother of Mike Love of the Beach Boys...and a very distant cousin of mine. 

D.K. Ulrich of NASCAR is stepfather to actor Skeet Ulrich.

I never knew Virgil Trucks was related to Derek Trucks. Easily my favorite slide-guitarist.  Thanks for the info!

Zac Bierk is the brother of Sebastien Bach, former lead singer of Skid Row

Wow, the cool and odd stuff people come up with. Well done. I probably knew about five of these, somewhere in the deep recesses of my mind.

v3

Very cool list!

Awesome list.  Despite probably the least known on the list, I didn't know Mike and Jonny Diaz were brothers.  Thats pretty cool.

I'm not sure if you include wrestlers on the list, but Sasha Banks is related to Snoop Dogg (first cousins) and also Brandy and Ray J (not sure how, but its on wikipedia and confirmed from a tweet she wrote).