Kaikoa sits next to 4 phonetic neighbors — Kaiko, Kaikoa, and Kailoa are the closest matches by sound. Most share Kaikoa's Hawaiian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"warrior of the sea"
"Supplanter (from Jacob/Jakob)"
"modern coinage combining Jay (God) and -ren suffix"
"from the ledge farm, shelf settlement"
"modern invention with Arabic suffix influence"
"to wander, to travel freely"
"independent, nonconformist"
"God is gracious"
"precious green stone; holder of good"
"honoring God"
"wood, timber"
"ordained minister's helper"
"one who carries the anointed"
"from the rocky peaks"
"spiral, coil"
"son of Jack"
"rising in the east; the hunter"
"the writer, the recorder"
"a people, a community"
"six"
Similar sound: These names share phonetic patterns with Kaikoa — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hawaiian origins, giving them the same cultural heritage as Kaikoa.
Rhythm: Kaikoa is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.