Vaiana is a Tahitian and broader Polynesian name combining vai (water) and ana (cave, place) — meaning "from the water" or "water cave." It is the international title of Disney's Moana.
Vaiana is widely used in French Polynesia.
Vaiana 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 Vaiana reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.