Aillene sits next to 5 phonetic neighbors — Aileen, Eileen, and Irene are the closest matches by sound. Most share Aillene's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bright shining one; light"
"gift of God"
"heart, courageous heart"
"Daybreak, first light of day"
"from Corinth"
"wise counsel"
"noble and pure"
"type of narcissus flower, pale yellow"
"God is gracious"
"little orca, little whale"
"lily (Sue/Susan) + grace (Ann/Anne)"
Similar sound: These names share phonetic patterns with Aillene — 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 Aillene.
Rhythm: Aillene is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.