Ellowen sits next to 4 phonetic neighbors — Elowen, Eloise, and Rowen are the closest matches by sound. Most share Ellowen's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"elm tree"
"fruit that cries (expels water)"
"good mind, beautiful mind"
"Myrtle tree; bride"
"help; divine support"
"my father rejoices"
"yawning emptiness, vast chasm"
"elaboration of Etta (ruler of the home)"
"patient, brave, wise, resolute"
"island"
"beautiful being, graceful"
"apple moon"
"righteous, virtuous, pious"
"hazel tree (via Hazel)"
"fair one, bright, handsome"
"great, large"
Similar sound: These names share phonetic patterns with Ellowen — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Cornish origins, giving them the same cultural heritage as Ellowen.
Rhythm: Ellowen is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.