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.
You searched for names like
"favorite one (Swahili origin)"
"coined name with no single origin"
"Peace"
"noble valley"
"lord of goals, ruler of aims"
"anointed one"
"one who fights for possession"
"one associated with summer"
"Modern African-American invented name; possibly related to Tanisha ..."
"peaceful, tranquil"
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.