There's also Ulysses S. Grant. The "S" was apparently just a mistake on his enrollment at West Point. His birth name was Hiram Ulysses Grant. He tried to switch his first and middle names, but ended up with the initials USG instead of UHG.
And then there's the odd case of "Thomas a Becket." Thomas Beket was never called Thomas a Becket in his lifetime. He apparently went by many names, one of which was "Beket," but never "a Becket."
I have a family member whose middle name is a letter. A friend of mine has two family members that only have initials for their first name (one was named for the other). When the older joined the army they just gave him a name that fit the initials and that went on all his official paperwork.
I had a friend like this in college. His name was AJ. That's it. Just the letters.
Everyone in the department spent ages trying to guess what it stood for. I managed to glance his ID when we got lunch together once. His name was just AJ. There weren't even periods marking it as an abbreviation.
Have an old friend/colleague with the last name Oh, share the same first name, so at work we would always say, John S., John D, John O type of deal, for some reaosn it would keep me wondering if we were really saying Oh or O. For him. (John isn't really the first name, just an example)
My grandpa's name was Larry. I had always assumed it was short for Lawrence. I just found out recently like 8 years after he died that it wasn't even short for that. Apparently my illiterate great grandparents wanted to name him Larrington (which I'm 90% sure isn't even a first name in the lexicon). Apparently my great grandmother wanted him to grow up to be Larrington the Lawyer. My guess is that was a name of a local law firm she had heard of something because it definitely sounds like a surname that you would hear on a law office advert, (i.e. call Larrington and Mitchell). Turns out they couldn't spell Larrington and just decided to name him Larry for short. So his fucking birth certificate has a nickname on it for a name he wasn't even born as. My mind was fucking blown hearing this.
My dad's name was the shortened version of a longer name and he said teachers in the prestigious British high school he went to (he went on scholarship, he wasn't rich himself) continually insisted that his name must be the longer version no matter what he tried.
He was also told, "children at this school go to Oxford or Cambridge" by his headmaster when he asked for a letter of recommendation when applying to Sheffield. He got into Sheffield anyway. Eventually got a PhD. Fuck that guy.
I used to work with a guy that was from China. He only had a first in a last name. He was going to college here and the college required everyone to have a middle initial as part of their login. They just used his last initial as his middle initial.
Wait does everyone there have a middle name? I'm Dutch and I don't have a middle name. I figured that was quite common also in the English speaking world
He's the only person I've known here in almost 50 years without a middle name. It's quite possible other people haven't had a middle name but it's never come up.
What a coincidence. I never knew this despite my penchant for useless trivia but just yesterday at an airport I overheard some high school kids asking each other trivial pursuit questions and this was one. The next day: this post. Uncanny.
To be fair to the person above, that's actually the source given for how Truman wrote his own name, not for the S not standing for anything. The reference for that is number 8, which is a book rather than a website. That said, the one you linked does back up the S not standing for anything anyway