Meghna is from the Sanskrit meghnā (मेघना — cloud, rain-bringing cloud, the iconic Meghna River). 4th century CE) by Kalidasa — widely considered the Sanskrit-language poem; the iconic Meghna River is one of the three rivers of Bangladesh (along with the Padma and Jamuna) — central to South Asian geography and culture; the iconic Bay of Bengal Meghna estuary is one of the largest river deltas in the world. Meghna Naidu — Indian actress. Meghna Pant — Indian-American novelist. Princess Meghna — Hindu heritage naming.
Meghna 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 Meghna reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.