Caitlyn sits next to 5 phonetic neighbors — Kaitlyn, Caitlin, and Katelyn are the closest matches by sound. Most share Caitlyn's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pure, unblemished"
"joyful, my God is abundance"
"pledged to God, God is my oath"
"star of the sea; beloved"
"Tinsley's field or meadow"
"wise messenger, prophet bird"
"pledged to God, my God is an oath"
"noble meadow, noble clearing"
"lord have mercy (liturgical phrase)"
"romantic love, the god of love"
"gentle, bright day"
"God will increase, God will add"
"noble and kind"
"longed for; wished for"
"divine timelessness, immortality"
"illusion, divine power"
"chosen, selected, specially picked"
"industrious, from the Amal clan"
"diminutive of Philippa/Filippa"
"the state of being divine or sacred"
"from the brick clearing or meadow"
Similar sound: These names share phonetic patterns with Caitlyn — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek via Irish origins, giving them the same cultural heritage as Caitlyn.
Rhythm: Caitlyn is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.