Nephele is from the Greek Νεφέλη (Nephelē — cloud). Nephele is one of the Greek feminine names — central to traditional Greek mythological heritage. Greek feminine name reflecting Greek mythological heritage.
Nephele 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.
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In Pythagorean numerology the letters of Nephele reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.