Kai sits next to 3 phonetic neighbors — Kay, Ray, and Jay are the closest matches by sound. Most share Kai's Hawaiian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sea"
"the healer (Iason)"
"Yahweh is gracious"
"mounted warrior, horseman"
"son of David"
"people's king"
"great, magnificent"
"patrician, of noble birth"
"strong and brave"
"flowing body of water, stream"
"son of Gray"
"of the forest"
"narrow road, path"
"light"
"Roman colony at the lake"
"messenger"
"guide, wide"
"son of Carsun, dweller near the marsh"
"adornment, goodness"
"firm foundation"
"greatest"
Similar sound: These names share phonetic patterns with Kai — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hawaiian origins, giving them the same cultural heritage as Kai.
Rhythm: Kai is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.