Hiranya is from the Sanskrit हिरण्य (Hiraṇya — gold, precious, golden) — from Proto-Indo-European ǵʰelh₃-. Hiranya is one of the Sanskrit feminine + unisex names — central to traditional Hindu Vedic heritage. Sanskrit feminine name reflecting Hindu cosmogonic heritage.
Hiranya 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.
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In Pythagorean numerology the letters of Hiranya reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.