Nemesis (Νέμεσις) is the Greek goddess of retribution and divine justice — particularly the punisher of those guilty of hubris (excessive pride). She ensured that human happiness was never disproportionate.
Nemesis does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Nemesis reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.