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"
"wholeness, peace"
"the almighty (divine attribute)"
"supplanter, may God protect"
"great"
"blessed, enjoying divine grace"
"worshipper of Al-Rahman"
"helped by God"
"the commended one"
"God will increase, God will add"
"lamplight, torch"
"may He add"
"people of the grass"
"helped by God, God has helped"
"worshipper, devotee"
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.