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"
"from the fen, marshland dweller"
"the younger one"
"sea"
"behold, a son"
"noble and famous"
"none compares to God"
"faithful, loyal, trustworthy"
"coined celebrity name"
"highest point, God's place"
"great river, wide flowing water"
"Canaan, land of merchants"
"primordial deity, elder god"
"little ancient one"
"watchful, vigilant (via Casey)"
"peddler, pack-horse driver"
"supplanter, one who follows"
"dark blue water"
"noble lord"
"powerful counselor (via Ronald)"
"the one who saves"
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.