Merab (מֵרַב) is the Hebrew word for "increase" or "abundance." In 1 Samuel 18, Merab was Saul's older daughter — promised to David but given instead to Adriel. Mother of five.
Merab is widely used in religious Jewish and Georgian families. Also a Georgian masculine name (Mediterranean transliteration).
Merab 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 Merab reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.