Cassidy sits next to 5 phonetic neighbors — Cassandra, Cadence, and Callie are the closest matches by sound. Most share Cassidy's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"curly-haired"
"beloved, wished-for child (from Hebrew Miriam via Mary)"
"saw-toothed ridge"
"grace, mercy"
"fair; beautiful; harmonious"
"happy one"
"God is my light"
"helped by God"
"the winter season"
"the Holy Trinity; threefold"
"girl (divine feminine)"
"whole, universal"
"fairy queen, princess"
"descending river"
"pure, clear"
"clean, unsullied"
"little bird"
"sea battle, sea fighter"
"life; living; breath"
"star, heavenly body"
"beautiful ray of light"
Similar sound: These names share phonetic patterns with Cassidy — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish origins, giving them the same cultural heritage as Cassidy.
Rhythm: Cassidy is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.