Karnavati is from the Sanskrit karna (ear) and vati (possessing) — "the listener." Rani Karnavati (d. 1535) was the Rajput queen of Mewar — wife of Rana Sanga of Chittor. When her kingdom was besieged by Bahadur Shah of Gujarat in 1535, she sent a rakhi (sacred thread) to Mughal Emperor Humayun, claiming him as brother and asking for aid. Humayun marched to her defense but arrived too late — she had committed jauhar with the women of Chittor.
Her rakhi to Humayun is one of the most touching stories of Hindu-Muslim brotherhood in Indian tradition.
Karnavati 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 Karnavati reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.