Charnissa sits next to 5 phonetic neighbors — Charissa, Clarissa, and Denise are the closest matches by sound. Most share Charnissa's American invented-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"graceful, charming (implied by components)"
"thanks, gratitude"
"who is like God (Michael root)"
"pearl"
"joyful, exuberant"
"meadow near the hermitage"
"modern invented name"
"pure, clean"
"bitter"
"little rock, handsome, beautiful"
"tranquility, cessation of war"
"path dweller (feminine form)"
"of the heavenly sky"
"French diminutive feminine form of Ariel or Gabriel root"
"the autumn season, time of reaping crops"
"rocky fortress city"
"wished-for child, beloved"
"from the Tatius family"
"member of the Gaut tribe"
"work, home"
Similar sound: These names share phonetic patterns with Charnissa — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have American invented origins, giving them the same cultural heritage as Charnissa.
Rhythm: Charnissa is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.