Themis (Θέμις) is the Greek Titaness of divine law, order, and customary justice — "that which is right." Second wife of Zeus, mother of the Fates (Moirai) and the Hours (Horae). She is depicted blindfolded holding scales — the iconic Lady Justice.
Themis is one of the most iconic figures in Greek mythology.
Themis 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 Themis reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.