The  Entity to whom we cal Kuhuda is Persian word of the same entity to whom  Arab called Allah.Allah is not generic name of That Entity.In Quran  Allah described himself Allah because Arab was acquinted with this  name.If Allah described Himself with other name than Allah then it was  very difficult  for Arabs to accept that name.When Allah called Himself  Rahaman in Qura...n  then Arbs objedted to it and said "Who is Rahaman we do not know  Rahaman".This is Why Allah described Himself Allah.There cannot be  generic name of Allah because Allah is not produced by any body which  named Him Allah. He is present from time immorrial on His own force.We   recognise Him only by His attributes.y.By reading Quran I have come to  the conclusion that HE likes to be called RAHAMAN.And this is Isme Azam.  Allah is Entity which in Persia is called Khuda, in India Bhagwan or  Ram , in Euroupe God.