Evonia sits next to 4 phonetic neighbors — Yvonne, Evonne, and Ivonia are the closest matches by sound. Most share Evonia's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"yew wood, yew tree"
"coyote valley (Coast Miwok place name)"
"rules by the spear"
"Famous warrior full of grace"
"gift of God"
"from the beech tree estate"
"famous, shining"
"spear ruler, noble one"
"eagle"
"famous in battle (via Clothilde)"
"he will laugh, he will rejoice"
"hero, man of courage"
Similar sound: These names share phonetic patterns with Evonia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Celtic/Old French (iv) origins, giving them the same cultural heritage as Evonia.
Rhythm: Evonia is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.