Here is one that is pretty well known : Amy Schumer and cousin Sen. Chuck Schumer
Doug Fieger of the Knack and his brother Jeff Fieger a lawyer who ran for governor of Michigan and defended Dr. Kervorkian. Doug died in 2010
Gerard Way of My Chemical Romance and cousin Joe Rogan but they have not met
any others?
Actress Sally Field’s brother Rick is a physicist. I don’t think he’s particularly well-known though.
Paul Giamatti the actor is the son of the late Baseball Commissioner Angelo Bartlett Giamatti
Rooney & Kate Mara are the daughters of Tim Mara & Kathleen McNulty. Tim Mara is the son of Longtime Giants owner Wellington Mara and Kathleen’s grandfather was Steelers founder Art Rooney Sr.
Journalist Chris Cuomo’s brother was Andrew Cuomo, governor of New York. We now know that the line between journalist and politician was a little blurry.
And of course their father was Mario Cuomo. Governor of NY and AAA Baseball player.
Old one, Katherine Hepburn’s Mother was pretty famous in her day.
Katharine Martha Houghton was a leader of the suffrage movement and co-founder Planned Parenthood.
Winston Churchill’s mother was Jennie Jerome, daughter of famed financier Leonard Jerome. A leading figure in Brooklyn, NY.
Here’s a 3-fer:
Rahm/Ari/Ezekial Emmanuel
Politician/Agent/Doctor
Radio host Ira Glass is a cousin of composer Philip Glass.
George Clooney is Rosemary Clooney’s nephew.
Anderson Cooper is Gloria Vanderbilt’s son (and they’re both descended from railroad magnate Cornelius Vanderbilt).
Werner Klemperer (a.k.a. Colonel Klink on Hogan’s Heroes) was the son of conductor Otto Klemperer.
Michelle Obama’s brother Craig Robinson was head men’s basketball coach at the University of Oregon for many years.
How about the Bayless brothers Rick and Skip. Rick and his Mexican cooking can be my friend, but I don’t think Skip can.
Sacha Baron Cohen of Borat and Ali G fame has a cousin, Simon Baron-Cohen, who is well known in the field of autism research.
Doonesbury cartoonist Garry Trudeau is the great-grandson of physician Edward Livingston Trudeau, who was a public health pioneer, particularly in the treatment of tuberculosis; Garry’s grandfather and father were both also physicians, who carried on Edward’s medical research work at what is now the Trudeau Institute in upstate New York.
Comedian David Spade’s sister-in-law was fashion designer Kate Spade.
Academy award winning film director Barbara Kopple had an uncle Murray Burnett who wrote an obscure play called “Everybody Comes to Rick’s.” The the film adaptation is a bit less obscure.
This is a really good one. Being in the Chicago area, I’d long known about Rahm and Ari, but when brother Zeke was named to President Biden’s COVID team, and started showing up on news shows, I discovered that he was the third brother.
Paul McCartney’s daughter Stella made a pretty good name for herself in fashion design.
Cartoonist Garry Trudeau (Doonesbury) is married to TV news anchor Jane Pauley.
Speaking of TV news, Al Roker is the cousin of musician Lenny Kravitz.
More TV news; Anderson Cooper is Gloria Vanderbilt’s son.
Grammy-nominated musician Elle King is shit actor Rob Schneider’s daughter.
Conan O’Brien and Denis Leary are cousins (although I don’t think they’re first cousins. Second cousins?)
Leslie Nielsen’s brother Erik was a Canadian member of parliament, cabinet minister and deputy prime minister.
And her niece is actress Rachel Brosnahan.
Jeff Bezos and George Strait are first cousins.
And a first cousin once removed (I think, I always get confused with these) of writer and linguist Victor Klemperer.