Arcadia sits next to 4 phonetic neighbors — Acadia, Aria, and Cordelia are the closest matches by sound. Most share Arcadia's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"land of pastoral paradise and contentment"
"old, wise"
"from Milan, gracious"
"life (as short form of Ava)"
"sacred, holy"
"laurel tree, bay laurel"
"forest, woodland"
"reborn, born again"
"garden, orchard of God"
"the azalea flower"
"radiant, shining"
"serene, calm, clear"
"state of well-being"
"grace, favor"
"torture wheel (folk etymology from Saint Catherine)"
"woman of Delphi"
Similar sound: These names share phonetic patterns with Arcadia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Ancient Greek place name origins, giving them the same cultural heritage as Arcadia.
Rhythm: Arcadia is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.