Novomira means both “new world” and “new peace,” derived from the elements noviy mir (which is also the name of a venerable Russian literary magazine in business since 1925). Starting in The Thaw of the early Sixties, the magazine became a haven for dissidents. The male form of this name is Novomir.
I have two Novomiras, one born in 1961 in Atlantic City (no Russian ancestry) and one born in Manhattan in August 1921. The first time I used the name, I saw it in the names appendix of my father’s old dictionary and thought it sounded really groovy, no idea it was a modern Soviet name. The second time I created a Novomira, it was because her parents wanted to mark the fact that she was special enough to be born in the new world they’d just come to in May. Her nickname is Mira. Another legitimate nickname could be Nova.
Nadir is simply a modern Russian name as far as I can tell, not composed of elements from political phrases or concepts. It means “nadir,” just as it does in English. Thankfully, in Russian, this only refers to an astronomical nadir, not a person’s lowest, saddest point (nizshaya tochka).
In astronomy, nadir refers to the point on the celestial sphere directly beneath a given position or observer, diametrically opposite the zenith. In Astrology, it refers to the point of a horoscope opposite the midheaven, or the Cusp of the Fourth House. I suppose this name was popular because science was so revered and popular in the early Soviet years.
http://panzercentral.com/forum/viewtopic.php?f=96&t=36301 (penultimate post)