Caisha sits next to 4 phonetic neighbors — Keisha, Kaisha, and Aisha are the closest matches by sound. Most share Caisha's Swahili/African-origin cluster, so the rhythm and vowel shape carry across the list.
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"favorite one (Swahili origin)"
"lord of goals, ruler of aims"
"coined name with no single origin"
"Ireland or land of abundance"
"valley, dale"
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"Modern African-American invented name; possibly related to Tanisha ..."
Similar sound: These names share phonetic patterns with Caisha — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Swahili/African origins, giving them the same cultural heritage as Caisha.
Rhythm: Caisha is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.