Interestingly, there is almost always confusion about this issue. But never fear, it's NEVER your fault - the following from the Browning website:
© 2016 Browning
If that's what Browning puts out in public EVERYONE has the right to be confused.
Briefly, you have to understand that FN asked JMB to design this pistol pursuant to French Army requirements. So that starts the facts from the get-go. But the 1911 was still covered by patents that Colt bought from JMB so he had to create/design a gun that did not violate those patents. Right in the middle of this work Browning died. A couple of years later the patents expired and his FN teammate, Dieudonné Saive, was able to use various aspects of the 1911 design to complete the Hi-Power.
The best name is probably Browning-Saive Hi-Power but you know that won't work!
So, it's kind of like asking you who was the first President of the United States. Your answer will be George Washington - EVERYONE knows that. The fact that John Hanson was the first President of the US under the "Articles of Confederation" that preceded the US Constitution is generally overlooked and there are all sorts of arguments, pro and con. But we go with what works best!
And that's the name of that tune............![]()
FN asked JMB to design the pistol around Saive's magazine design. JMB thought that there was no need for a high capacity magazine in a combat pistols.
JMB was a contractor to FN so he worked on the project that was presented to him. He submitted two designs one of which was accepted for further testing.
Browning makes the claims of JMB's design strictly for marketing purposes. It is not based in facts.
Your Presidential analogy does not fit IMHO. All one has to ask themselves to prove its negative truth value is, "Is this the pistol you shoot and call the BHP?"

If the answer is no, which it is then JMB did not design the pistol you are shooting.