Hira is from the Urdu/Persian/Sanskrit hīrā (हीरा — diamond) + Arabic Ḥirāʾ. Hira is one of the Urdu + Hindi feminine names.
Hira 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 Hira reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.