“The Calvin Coolidge Home for Dead Comedians” by Bradley Denton
Which reminds me: Bradley Denton also wrote Buddy Holly Is Alive and Well on Ganymede.
I’m pretty sure ol’ Ivan was not a real person, however accurate the description of life in the gulag.
If we are counting movies, you’ve got To Wong Foo, Thanks for Everything, Julie Newmar.
Nuts! I came in here to post that very title.
Heh, I went through the whole thread thinking surely somebody had beaten me, and aha! For ONCE I beat somebody else!
I Love You, Alice B. Toklas is a funny movie in which Alice B. Toklas is not a character (although her brownies are featured).
He was fictional, and he would be disqualified since the title doesn’t have his full name, which was Ivan Denisovich Shukhov.
Audrey Hepburn’s Neck, by Alan Brown.
Just to be clear, Dori Seda was a real person who, like Bangs, died at an early age in real life. Bangs and Seda never met in real life but in Sterling’s story, they didn’t die and later met and married.
Tom Jones, by Henry Fielding.

I, Claudius
King David’s Spaceship by Jerry Pournelle, although that wasn’t the King David most people would think of.
Moab Is My Washpot by Stephen Fry, if you accept Moab (the son of Lot, born as a result of Lot’s drunken incest with his daughter) as having been a real person.
I, JFK by Robert Mayer, a strange but oddly affecting book about John F. Kennedy in the afterlife.
His full name was [Tiberius Claudius Caesar Augustus Germanicus; before his accession, Tiberius Claudius Drusus Nero Germanicus.](Tiberius Claudius Caesar Augustus Germanicus) Also, I believe, granted the additional cognomen “Brittanicus” after conquering Britain.
David Copperfield?
Marco Polo, If You Can by Bill Buckley.
Plus any number of historical novels that are actually about the person named, e.g., Messr. Marco Polo by Brian Oswald Donn-Byrne, Owen Glendower by John Cowper Powys, etc.
Jesus on Mars
Speaking of Rita Hayworth, there’s “Betrayed by Rita Hayworth” by Manuel Puig.
If we’re expanded beyond novels, there’s the play and film “Come Back to the Five and Dime, Jimmy Dean, Jimmy Dean” (which, the name is technically James Dean but close enough).
The King and I or Anna and the King… but that’s probably not specific enough for the OP. His name was Mongkut.
King Solomon’s Mines