Beatrisa actually isn’t a modern Russian name, but I couldn’t find any invented Soviet B names for girls, and I wasn’t so hot on the few modern Russian B names adopted from other cultures, like Beata, Berta, and Bella. (The name Bella does not need anymore publicity!) Beatrisa is an old, established Russian name, their form of the lovely Beatrice. This is such a beautiful name; I think I might like it even more than Beatrice. I have two characters by this name. The younger Beatrisa is named for the grandmother she’ll probably never know.
Bulat seems to be a Kazakh name, though I first encountered it as the name of the great poet Bulat Shalvovich Okudzhava (9 May 1924-12 June 1997). His father was Georgian and his mother was Armenian. In addition to poetry, he also wrote and performed songs, and wrote short stories and novels. Since the Soviet era, the name Bulat has been seen more often in Russia proper, not just among minority groups of the Russian Empire.
http://panzercentral.com/forum/viewtopic.php?f=96&t=36301 (penultimate post)