Zeresh (זֶרֶשׁ) is likely from the Persian zaresha (gold). In Esther 5:14, Zeresh was the wife of Haman the Agagite, who counseled him to build the fifty-cubit gallows on which he intended to hang Mordecai — on which Haman himself was eventually hanged.
Featured in the Purim narrative.
Zeresh 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 Zeresh reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.