Why the list is so long
There is no mystery in it: the name has been among the most commonly given in the Muslim world for over a thousand years, and any name carried by that many people will produce its share of the notable. What is distinctive is the spread. Because the name crossed both the Ottoman world and the francophone one, its famous bearers are scattered across languages that rarely share a bibliography — a Turkish head of state, an Algerian footballer in Paris, a Syrian director in Hollywood, an Egyptian chemist in Georgia. Few names of comparable frequency turn up in so many unconnected archives.
That scattering has a practical consequence for anyone researching them. English-language databases index the same Arabic name under at least five different spellings and almost never cross-reference them, so a search for "Mustafa" will silently miss every Mustapha, Moustapha and Mostafa. Search all the forms; the reasons they differ are set out in Mustapha vs. Mustafa.
How this list is built
Only people we can verify as real and notable are included, and each is described from the documented record rather than from reputation. Where a figure is politically contested — Mustafa Barzani and Mustafa Kemal Atatürk both are — the profiles stay encyclopedic and neutral, note that debate exists, and leave the argument to sources better placed to have it. Fictional bearers are labelled as such: Mustapha Mond is a character, not a person.
Suggestions are welcome. If a notable bearer is missing, send the details — full name, dates, country and what they are known for — and we will check before adding.