god is an invention by man
this is based on the simple fact that the alphabet and thus the letters G.O.D were not available in the times of adam and eve
and as such no entity self scripted their name as god. but man later invented such a name in their stories and folk tales afterwards
But it is not so important how different nations call Him (or Her). God has different names and different manifestations because it is easier for people to understand this in their culture.
And God is not some kind of person, but something that cannot be described in words, but what happens to us in life when we feel sincere love for the world, for parents, for other people, when we sincerely do something good. This is all called God. But we can also call it in our own way, it is not so important as the manifestation of Love in life. Unfortunately, many people don’t understand such simple things (as I did before).