Leilani is a Hawaiian name combining lei (a garland of flowers, also "royal child") and lani (heaven, sky, sacred) — meaning "heavenly garland" or "royal child of heaven."
Leilani entered the U.S. top 1000 in 1955 and has been continuously used. Today it sits in the U.S. top 250 and is rising.
Leilani 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 Leilani reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.