User blog comment:Jkphantom9/BREAKING NEWS: Gray's Journal on the Future of RWBY/@comment-99.120.149.4-20150311060620/@comment-26281589-20150311134416

Monty Oum officialy named Kerry Shawcross and Miles Luna the co-creators of RWBY as they shared their ideas and also worked on the scripts of the previous volumes. They knew almost as much as Monty (Although Monty did have a few surprises). Like the previous people said in this comment chain, Monty is the originator, the original creator of this series who came up with it.

And as a person who had followed every single bit of RWBY information since the very beginning, this is the truth.