Douay Rheims was sourced from the KJV?
I don’ think so. It has a lot more books and more accurate translation from the Latin.
There is no accurate translation.
I’ll be charitable and say that you’re unintentionally promulgating an erroneous belief pertaining to the King James Bible. As originally authorized it most certainly contains the Apocrypha, or as you’d no doubt prefer, the Deuterocanonical Books.
As far as accurate translation from the Latin, perhaps such a high regard for that language at the expense of all others is source of error in and of itself?
The Latin??? I don't think Peter wrote or even spoke in Latin...
Jerome rewrote his Latin version from the 'old' Latin and called it the Vulgate...