The terms Prav, Jav, and Nav (Prava, Iava, Nava) are often used by modern Rodnovers and the self identified “Old Believers.”  Prav is the Spirit World, Jav is the physical world that we live in, and Nav is the Underworld. The terms would seem to originate in the questionable literary source, the Book of Veles, however, the concepts are a good way to describe the world of the seen and unseen. You can certainly use these terms if they work for you, but so as not to give...