Kayleen sits next to 5 phonetic neighbors — Kaylin, Kaileen, and Kaylene are the closest matches by sound. Most share Kayleen's Irish American-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"slender, fair, beloved one"
"creative feminine form combining Julia and -issa suffix"
"strength, power"
"of the mind, intellect"
"hidden, possibly myrtle plant"
"love"
"wealthy guardian"
"the great one, exhilarating"
"diminutive of Ivan/John"
"boar meadow, wild clearing"
"crowned with laurel, victorious"
"guiding light"
"heavenly, sky, royal"
"courageous, valiant"
"radiant, shining light"
"safe harbor, refuge"
"work power, vigor and rule"
"grace, kindness"
"feminine form of Charles"
"daughter of the sun"
"upright, virtuous"
Similar sound: These names share phonetic patterns with Kayleen — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish American origins, giving them the same cultural heritage as Kayleen.
Rhythm: Kayleen is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.