Mareva is from the Tahitian language — meaning "passing through" or "transient one," often translated as "sea passing" with the connection to the Pacific Ocean. Mareva Georges — Tahitian singer. Mareva Mai — French-Tahitian model. The Tahitian language is currently a living language with approximately 70,000 speakers in French Polynesia.
Mareva 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 Mareva reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.