I don’t think you can call any of those “family names”. Last names, yes, but not family names.
The father and brother of Douglas MacArthur were called Arthur MacArthur.
Oh, and I know a guy called Moshe Ben-Moshe
According to Stephen Fry, it translates as Peter Peter Potato 
I think an Icelander would say that they don’t have family names. They have patronymics. They would say that none of their names continue indefinitely long into the future (as long as none of their descendants move away from Iceland). They would say that their full name indicates what they were named at birth and what their father’s (or occasionally mother’s) name is.
The drama series In Plain Sight had US Marshal Marshall Mann.
I did know a Joyce Joyce once. Her husband was James Joyce, so she took it willingly.
And of course, in Catch 22 there is Major Major Major.
It just occurred to me that Doc Brown’s nonstandard pronunciation of “gigawatts” might be taken as evidence that he had gained most of his scientific knowledge through reading (i.e. he was familiar with the word in print but hadn’t heard it spoken).
Or from other people who use that pronunciation. It’s not common, but it is a known variant.
In Wall Street when Gordon Gekko first meets Bud Fox he is showing off some cutting edge blood pressure monitor. I usually assumed it was just some expensive 1980s toy or from some company Gordon was investing in.
I just recently remembered that later Gordon specifically mentions to Bud Fox how his father dropped dead of a heart attack at 49. So clearly he has real concerns about monitoring his health.
Well, in real life there was a Sergeant Sargent…
Sergeant Sargent …has won the Soldier’s Medal for heroism, for his rescue of a civilian tree serviceman who was trapped by a live high voltage power line 25 feet above ground.
Meet Lieutenant General Admiral
https://www.gomo.army.mil/public/Biography/usa-10635/kevind-admiral
And there was a Lieutenant Leftenant.
There’s always Christian Christiansen, discoverer of the Christiansen Effect (which I’ve used, frequently)
My favorite comment on it:
A: The “Boutros” part translates as “Peter”
B: What does “Ghali” mean?
C: “Pumpkin-Eater.”
Rewatched Friday Night Lights recently and holy hell the Taylor’s were bad parents. Yeah, Coach Taylor was an effective leader of young men, and Tammy Taylor was an effective leader of Coach Taylor, but neither of them knew how to handle Julie, lol. A perfect example was the Matt Saracen issue. In season one, Julie is hot for Matt and decides he gets to be the one she sleeps with first. After a bunch of mama-drama, Julie decides to not sleep with Matt.
2 seasons (and 2 years show-time) later, in season 3, Julie finally decides Let’s Go All The Way. And her mom is mad and literally (well, as close as I can remember anyway) screams “I wish you would have waited!” and I yelled back in poor Julie’s defense “Tammy, she waited TWO DAMNED YEARS!”
Poor kid does what her mom asks, gets yelled at for doing so.
Later on, her father just marches into a house that is not his and gets surprised when he finds his 17yo daughter in bed with his 18yo quarterback - well, that’s what you get when you just bust in someone’s house without knocking, Coach Taylor. Is that what you would teach your men - if you’re morally pure of heart, you can just break and enter wherever you want?
Of course she gets in trouble for sleeping with the guy they know she’s sleeping with, all because they are suck-ass parents.
Our foreign minister at the time Gareth Evans had ambitions to succeed Boutros Boutros-Ghali as SG of the UN. So naturally he was then known locally as Gareth Gareth-Evans.
Boutros Boutros-Ghali and his wife, Mrs. Mrs. Ghali.
There was a Canadian comic who had a bit. Someone asked him his name. “Why it’s Boutros. Boutris Ghali.” Then he was stuck with it.
I know we discussed Werewolves of London like 10 years ago in this very thread, but it took me until today to realize that
He was looking for a place called “Lee Ho Fook’s”
is a mix up of the syllables “Holy F*cks”
Lee Ho Fook was a real restaurant before Zevon wrote about it in Werewolves of London. I stumbled across once walking around Soho and had to eat there. It closed in 2008.