Wenu is from the Mapuche (Mapudungun) Wenu — sky, above, heaven. Wenu is one of the Mapuche feminine + unisex names — central to traditional Mapuche Indigenous heritage of southern Chile + Argentina.
Wenu 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 Wenu reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.