Oh! I love them! they're a lot of the Riesenschnauzer in their looks but more brawny. 
My favorite for a black independent female russian terrier would be "Curie" like Marie Curie who was born in Russia... okay it has two syllable but there are not many nice female names with one syllable in my opinion. Well you you've got the English nicknames but they often sound very harsh to me,
having several syllables makes the name softer in my opinion.
just because they're serious dogs, doesn't mean they can't have a cute name.
A male Rottweiler I know has the beautiful name "Tinkerbell".
well you could take a shortform of russian female names
Bornislava = protective glory ->Born(ie)
Borislava = fight/battle + glory -> Bor(ie)
Boleslava = great(er) glory -> Bol(ie)
Bogdana = gift of god -> Bog(gie)
your could also take male slavic names and make them female
Chernobog was a pre-christian Slavic god of darkness (chernyy means black), you could make it Chernoboga and then shorten it to Chern(o/ie). could make some people think of Chernobyl though.
Byelobog was a pre-christian god of happiness and it would be a bit funny because byelo means "white", female would be Byeloboga and shortened to Byel(o/ie). this is one of my favorites by the way. Byel sounds very feminine and cute to me.
most names with a "k" sound are written in with an "k" and not with a "c" if you use latin lettern, but you could also change the letter of course and shorten the names of course
all kind of forms of Katharina:
Karina
Katerina, Katinka, Katya, Katyusha, Katazina
Kira
Klavdiya/Klava
Kzeniya (rus. form of Xenia)
Klara
Kristina
or male names:
Karp
Kazimir
Kesha
Kir
Klim/Kliment
Kolya
Kirill
Konstantin/Kostya
Kuzma
My favorite for a black independent female russian terrier would be "Curie" like Marie Curie who was born in Russia... okay it has two syllable but there are not many nice female names with one syllable in my opinion. Well you you've got the English nicknames but they often sound very harsh to me,
having several syllables makes the name softer in my opinion.
just because they're serious dogs, doesn't mean they can't have a cute name.
A male Rottweiler I know has the beautiful name "Tinkerbell".
well you could take a shortform of russian female names
Bornislava = protective glory ->Born(ie)
Borislava = fight/battle + glory -> Bor(ie)
Boleslava = great(er) glory -> Bol(ie)
Bogdana = gift of god -> Bog(gie)
your could also take male slavic names and make them female
Chernobog was a pre-christian Slavic god of darkness (chernyy means black), you could make it Chernoboga and then shorten it to Chern(o/ie). could make some people think of Chernobyl though.
Byelobog was a pre-christian god of happiness and it would be a bit funny because byelo means "white", female would be Byeloboga and shortened to Byel(o/ie). this is one of my favorites by the way. Byel sounds very feminine and cute to me.
most names with a "k" sound are written in with an "k" and not with a "c" if you use latin lettern, but you could also change the letter of course and shorten the names of course
all kind of forms of Katharina:
Karina
Katerina, Katinka, Katya, Katyusha, Katazina
Kira
Klavdiya/Klava
Kzeniya (rus. form of Xenia)
Klara
Kristina
or male names:
Karp
Kazimir
Kesha
Kir
Klim/Kliment
Kolya
Kirill
Konstantin/Kostya
Kuzma