In Russian, there's Электра (transliterated as Elektra) but is very, very rare. The name itself sounds no Russian at all.
However, you can consider using it as a pseudonym; if you don't mind that it's not a Russian-sounding name, you can still use it. Elettra is too far-fetched, though.
This message was edited 7/23/2020, 10:47 AM