Well yes, great Odin has a brother actually ! Of course we do not poses nowadays any scripture prove of the fact, we have a greater testimony of that. Ask canyons, breath air, be quiet and hear him talk to you .

Not sure though how the timeline of events is, what we do think for sure is that the book of law (kanun) the purity of the origin, the great connection to the higher beings, the nature itself is a big piece of what great Odin made and said.