Rambha (रम्भा) is from the Sanskrit rambh (delight). Cursed by Ravana when she rejected his advances; saved by the curse he had received from her cousin's husband.
Featured in the Mahabharata, Ramayana, and Puranas.
Rambha 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 Rambha reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.