Phyu (ဖြူ) is the Burmese word for "pure white" — evoking purity and serenity.
Phyu Phyu Kyaw Thein (born 1979) is the Burmese actress.
Phyu 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 Phyu reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.