Kai sits next to 4 phonetic neighbors — Kay, Kye, and Ky 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, ocean"
"dyer of red cloth"
"supplanter, held by the heel"
"dweller near the ash trees"
"victory (short for Sigrid)"
"pure meadow"
"rye meadow, roe deer meadow"
"alert, observant"
"noble, high meadow"
"invented melodic name"
"Yahweh has shown favor"
"sorrow, regret"
"rhythm, musical flow, beat"
"grace, favor"
"claw, fingernail (Greek)"
"God's gift"
"from the church, basilica"
"meadow near the water"
"rose, flower"
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.