Nailani sits next to 4 phonetic neighbors — Leilani, Nalani, and Mailani are the closest matches by sound. Most share Nailani's Hawaiian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"heavenly calm, noble tranquility"
"daughter of the fire-born"
"jewel, ornament"
"pure, innocent"
"short form of Miranda, worthy of admiration"
"pleasantness, beauty"
"the black serpent (mythological Naga)"
"divine power (short for Oswald)"
"beloved, wished-for child"
"pledged to God"
"calm waters, serene sky"
"modern compound of Ken + Lee"
"stream settlement"
"magical, illusory beauty"
"God is my judge"
"carp fish; symbol of perseverance and good luck"
"may Jehovah add"
"seven, completeness and luck"
"dark one"
Similar sound: These names share phonetic patterns with Nailani — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hawaiian origins, giving them the same cultural heritage as Nailani.
Rhythm: Nailani is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.