Kacey sits next to 4 phonetic neighbors — Casey, Kasey, and Lacey are the closest matches by sound. Most share Kacey's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"brave in battle, vigilant"
"companion, fellow traveler"
"city of God (alternate interpretation)"
"Frenchman, man from France"
"peace, gentleness"
"spear ruler"
"king's meadow, king's clearing"
"high stronghold, fort on the headland"
"little ancient one"
"son of the red warrior"
"crew, group of companions"
"land bordering the sea"
"faith, pledge"
"counsel, power"
"who is like God"
"sprout, bud"
"tournament fighter"
"charming, wily"
"great one, straining force"
"the koa (warrior tree)"
"at the holly trees"
Similar sound: These names share phonetic patterns with Kacey — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic origins, giving them the same cultural heritage as Kacey.
Rhythm: Kacey is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.