Ofc Mohammed is the most common name but thats a name common within the muslim community. I have noticed the name Sarah in every country, regardless of race or religion. Or it might be an abrahamic religion thing but thats most of the world atleast.
I suspect other Abrahamic names might make the cut.
I don't know about first names, but as for middle names, I've noticed a 75% chance your middle name will be James if you're a guy and Marie if you're a woman. I also attended school somewhere where, I kid you not, every shop owner and public service manager was named either John or Julie.
I wonder what's up with that. At least for Marie it could be a catholic thing