What I know ... is the fact, that you wrote the Question ... about Belief in, and the Authorship of the Vaidas ...
Reckon, thats enough, by way of Knowing ... about an ancient Text; at par, with the Greek, Iliad.
For comparative details vis a vis my Islamic Belief ... I suggest you ask any good Muslim Scholar, conversant in Sanskrit ... preferably one of Indian Origin.
Dr. Zakir Naik, I think, is one, who may perhaps be able to help you out, if, you are really keen to know the names of the Vedic Text's authors, or, ask your Shastris, and Maharishis, conversant with the Texts of the Vedas.