Begum Hazrat Mahal (1820-1879) — "Presence of the Palace" — was a courtesan who became Begum of Awadh (Oudh) through her marriage to Nawab Wajid Ali Shah.
Honored on Indian and Pakistani postage; her tomb at Jama Masjid in Kathmandu is a Nepalese national monument.
Hazrat Mahal 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 Hazrat Mahal reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.