Kasai sits next to 4 phonetic neighbors — Kasai, Kasay, and Kasi are the closest matches by sound. Most share Kasai's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"fire"
"God will increase, God will add"
"lily flower"
"lead metal, dense and enduring"
"the commended one"
"lamplight, torch"
"Yahweh has helped"
"supplanter, may God protect"
"helped by God, God has helped"
"the almighty (divine attribute)"
"man of peace, peaceful one"
"warrior people"
"servant of the Most Merciful"
"mighty, powerful"
"trust, conviction"
Similar sound: These names share phonetic patterns with Kasai — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Kasai.
Rhythm: Kasai is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.