Wairua is from the Maori Wairua — spirit, soul. Wairua is one of the Maori feminine + unisex names — central to traditional Maori Indigenous Polynesian heritage of Aotearoa New Zealand. Maori feminine name.
Wairua 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 Wairua reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.