Caisley sits next to 5 phonetic neighbors — Paisley, Kaylee, and Bailey are the closest matches by sound. Most share Caisley's Modern American-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"invented modern name with no historical etymology"
"God is my father"
"God is gracious"
"each of the two (variant etymology)"
"hidden"
"heavenly, sky (lani element)"
"exalted, noble, high"
"downy-bearded, youthful"
"shining, luminous"
"beloved, sweetheart"
"Grace and devotion blended"
"protector"
"descendant of Corraidhín (little spear)"
"life, living essence"
"night, dark beauty"
"God has heard"
"fair, white, blessed"
"peaceful, tranquil"
"name of God"
"the road, the passage"
"sun, solar energy"
Similar sound: These names share phonetic patterns with Caisley — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Modern American origins, giving them the same cultural heritage as Caisley.
Rhythm: Caisley is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.