Eowyn sits next to 3 phonetic neighbors — Elowen, Aoife, and Rowan are the closest matches by sound. Most share Eowyn's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"horse joy"
"strong, virtuous, honorable"
"free one, Frenchman"
"pinkish-orange color of the sea"
"free woman"
"from the ash tree farm"
"God is gracious"
"heavens and flowing water"
"home strength"
"God beholds, foresight"
"courageous, lively"
"April, fourth month"
"vigilant, watchful in battle"
"dearness, preciousness"
"shining with glory"
"mountain nymph"
"strong"
"beautiful Mary"
"life, living"
"land of the Aryans"
"high tower"
Similar sound: These names share phonetic patterns with Eowyn — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Eowyn.
Rhythm: Eowyn is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.