"Who said my kids are brilliant?" Benjamin Emanuel asks. "Did you talk to them? If you talk to them, tell them to call their father." Kidding aside, Benjamin and Marsha Emanuel have some impressive offspring: Zeke is an oncologist and bioethicist; Rahm is a U.S. congressman from Illinois; and Ari founded the Endeavor Agency in Los Angeles.

Other brilliant siblings:

• Jeff Berg, C.E.O. of International Creative Management; Scott Berg, biographer and National Book Award winner; Tony Berg, music producer; and Rick Berg, literary agent.
• Writers Hallie, Nora, Delia, and Amy Ephron.
• Filmmaking brothers Joel and Ethan Coen.