Onatah is the Iroquois (Haudenosaunee) name of the corn spirit — daughter of Mother Earth, the bringer of the harvest. One of the Three Sisters of Iroquois agriculture (corn, beans, squash).
Used as a feminine name in Iroquois tradition.
Onatah 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 Onatah reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.