I've spent half an hour looking for possibilities for Nikita, and found that the name has strong connections to Greek mythology. Basically, Nikita → Никита (as Nikita Khrushchev made it a known name in the West) → Ἀνίκητος (Aniketos), which is Ancient Greek for being invincible. From there, it splits off into multiple dead ends.
Possibilities I've seen tonight includes:
- Anánkāi d'oudè theoì mákhontai. ("Not even the gods fight necessity.") A line by the Greek poet Simonides of Ceos.
- By using a Roman transliteration, we get to Alexiares and Anicetus, two of the three guardians of Mount Olympus.
By assuming it to be a name-ification of Niki, we get to the Greek pronunciation of Nike, the Greek goddess. There is an asteroid named 307 Nike that was discovered in 1891, but it's not a very important one.
If we get a bit wild with the sequences, Niki leads through various international spellings, such as the Polish "nikiel", to Nickel, a material believed to come from iron-nickel meteors crashing down on Earth. On top of it, nickel is used in a "German silver" mix with copper and zinc.
Am I close to any conclusion, or does anyone here want to do some more research or have insight on it?