Arda sits next to 3 phonetic neighbors — Arden, Ardan, and Arlo are the closest matches by sound. Most share Arda's Turkish/Tolkien-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"earth, land, world"
"storyteller, keeper of oral tradition"
"the divine creature of Islamic tradition"
"God is salvation"
"victory of the people"
"eternal, fresh, ever-renewing"
"Aegean Sea"
"ruler of glory, ruler of the world"
"divine splendor"
"generous sharer"
"defender of the people"
"elder brother, wise child"
"man from Lucania"
"bright, luminous"
"sun deity, solar force"
Similar sound: These names share phonetic patterns with Arda — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Turkish/Tolkien origins, giving them the same cultural heritage as Arda.
Rhythm: Arda is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.