Jahanara (جہاں آرا) combines the Persian jahān (world) and ārā (adornment) — "adornment of the world." Princess Jahanara (1614-1681), eldest daughter of Shah Jahan and Mumtaz Mahal, was the most powerful Mughal princess — she ruled the imperial harem and supported her father during his imprisonment.
Jahanara 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 Jahanara reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.