Pavai means a young maiden — and also a doll or lovely image, as in the devotional Thiruppavai. It carries youth, purity and grace.
Pavai 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.
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In Pythagorean numerology the letters of Pavai reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.