The so-called "unified translation" of the Bible that is commonly used nowadays really doesn't have that much to do with the original Bible anymore, as they stretched and twisted things quite a lot however they saw fit.
For e.g. in the original version of the old testament in ancient Hebrew, there isn't only one "God" or "the Lord" as they want us make believe, but rather
12 distinct persons: GD, JHWH, HSM etc. (ancient Hebrew script was purely consonantic, vowels weren't written). That these aren't just names for one person, but several persons, is indicated by the frequent use of the plural which even transpired into today's translations:
Creation story: "Come, let
us make the human after
our likeness."
Tower of Babel: "Come, let
us go down and confound their language..."
etc... countless other examples abound.
Now, either there was just one person who was extremely schizophrenic (very unlikely), or there were several persons indeed.
Another pitiful excuse that is brought up by some one-god-defenders is that it would be "pluralis majestatis" (plural used by royalty to refer to themselves). This is utter nonsense, since this only started to be used during the renaissance, several hundred years later.
Also, as Winter already said, especially the old testament is a mixture of all sorts of stories, not only form the Sumerians, but from many others as well. They just picked whichever stories they liked, completely regardless of their origin, and then put them in after a little tweaking here or there.
For those who are interested, here is the Jewish Bible, a better translation of the original Bible where you can see the different names:
Jewish Bible (JPS 1917)
