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.
The most common Indian names are Hindu names which are isolated in India. Similarly the most common names in China are isolated there. Hence my argument for Abrahamic religions.