Interesting. I looked around - could the name have been AuroraUX? A page about it survives in Russian wikipedia (deleted in English back in 2012).
It's said to have been based on DragonFly BSD, with new components written in Ada (!), but also supporting Cyclone.
Oooh I think that might actually be it! I think they went from Linux to BSD eventually... (Totally forgot about that change) I just remember 'AUX' being part of the name, maybe they changed it to AuroraUX after some time. Nice catch thanks! :D