Aelyn sits next to 5 phonetic neighbors — Aileen, Eileen, and Aylin are the closest matches by sound. Most share Aelyn's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bright, radiant"
"young person of noble birth"
"one who charts new territories"
"precious green gem"
"God is my judge"
"devoted to the harvest goddess"
"from Kimberley place name"
"victory; blue jay bird"
"descendant of Ceanneidigh"
"God is gracious"
"channel, waterway"
"gentle strength"
"peace"
"beautiful moon"
"strength of God"
"flower, blossoming"
"broken land, marsh"
"Kensington meadow"
"royal child of heaven"
"little Goth, little joy"
Similar sound: These names share phonetic patterns with Aelyn — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Irish/Celtic origins, giving them the same cultural heritage as Aelyn.
Rhythm: Aelyn is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.