'bin' is a Arabic patronymic construction which means 'son'. So the name is literally "Batman, son of Suparman"
Well, actually 'Suparman' is common name among the Javanese. It has got nothing to do with Superman.
Djadja Suparman
Rubiah Suparman - IMDb
Ade Suparman
Suparman Kusuma
Maman Suparman
But BATMAN ????
Moreover the name has been perfectly transliterated into Arabic(Jawi script) and not a lot of internetz guys can do that.