Jaci sits next to 4 phonetic neighbors — Jacey, Jacy, and Jackie are the closest matches by sound. Most share Jaci's Tupi-Guarani-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"the moon"
"alluring, enchanting one"
"golden, of gold"
"dark-feathered bird"
"beloved, wished-for child"
"son/daughter of Kenneth"
"life, living one"
"blue jay bird (from Jay)"
"of the dark one, of Kali"
"admirable, hawk-like"
"truth, unconcealedness"
"God has answered"
"olive tree"
"meadow variant of Taylor"
"queen"
"twin, a twin"
"descendant of the helpful one"
"spotted stone"
"kings clearing"
"June, sixth month"
Similar sound: These names share phonetic patterns with Jaci — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Tupi-Guarani origins, giving them the same cultural heritage as Jaci.
Rhythm: Jaci is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.