Cayleigh sits next to 5 phonetic neighbors — Kaylee, Kayleigh, and Bailey are the closest matches by sound. Most share Cayleigh's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from céilí, traditional Irish dance gathering"
"little king"
"feminine form of John"
"devoted to God"
"heaven, sky"
"Roman god of war"
"bright, handsome"
"member of the Gauts tribe"
"date palm tree"
"beloved, star of the sea (Mary) + famous warrior (Lou)"
"land ruler, powerful ruler of the land"
"son of Maude (alternative etymology)"
"enchantress"
"silver, bright"
"cap maker or seller"
"water spirit (possible classical influence)"
"bright, shining one"
"song, melody, air"
"best, excellence"
"one who brings good luck"
"gift of grace, divine favor"
Similar sound: These names share phonetic patterns with Cayleigh — 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 Cayleigh.
Rhythm: Cayleigh is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.