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The name you're talking about for the stage name is spelled Oktyabrina.
It also probably wouldn't be good to use because it was a communist name, and a lot of Jews don't like communism due to the treatment of Jews under the Soviet Union.
"Julia" would be written as Yuliya unless her target audience is western people.
"Wolfina" isn't an actual last name and it would make more sense to be a stage name than a birth last name.
You could use Vovk, Vovchuk, Vovnenko (etc, there's more variants) which are all Ukrainian variants of a last name meaning "wolf".

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As for the first name:
Depending on how Jewish you want the character to be, you could go with either a Yiddish name or a Slavic name. If you want her to be more Russian, a Russian name would be better, and a Ukrainian one for more Ukrainian. Anyways:

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Yiddish: (all of these names are Russified variants of Yiddish name)
Rifka (variant of Rivka)
Sheyna (variant of Shayna)
Krayna (variant of Kreine)
Freyde or Freyda

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Ukrainian:
Halyna (Russified: Galina)
Ivanna
Oleksandra (Russified: Aleksandra)
Yuliya or Ulyana

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For Russian names, I'll give you basically the same thing.
Galina
Zhanna
Aleksandra
Yuliya, Ulyana, or Yuliana