Firouzeh is from the Persian فیروزه — turquoise (the gemstone). Firouzeh is one of the Persian feminine names — central to traditional Persian gemstone naming alongside Yas (jasmine), Mahsa (moonlike), and Roxana (dawn). Persian feminine name in modern Iranian diaspora.
Firouzeh 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 Firouzeh reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.