Jiwoo (지우) is a Korean name combining ji (wisdom, intelligence) and woo (universe, abundance). Used as a feminine name in modern Korea, also occasionally masculine.
Jiwoo is widely used in Korea.
Jiwoo 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 Jiwoo reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.