Isae is the Korean stage name from i (this) + sae (new). hits Who Dis? (2020) + DOOMCHITA (2022) + TAP (2023).
Isae 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 Isae reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.