Poli is from the Hopi Poli — butterfly. Poli is one of the Hopi feminine names — central to traditional Hopi Indigenous Uto-Aztecan heritage. The Hopi butterfly is central to Hopi katsina (kachina) spiritual heritage Poli Kachina (butterfly maiden Hopi female puberty/coming-of-age dance Snake-Antelope ceremony). Hopi feminine name reflecting Pueblo Indigenous heritage.
Poli 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 Poli reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.