Punjabi Sikh-heritage naming — the Punjabi har- prefix refers to the iconic Sikh divine name Har (God) — central to Sikh devotional naming tradition. Princess Harnaaz — Punjabi-Sikh heritage naming.
Harnaaz 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 Harnaaz reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.