Arash sits next to 4 phonetic neighbors — Aras, Arash, and Rasheed are the closest matches by sound. Most share Arash's Persian/Avestan-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bright, shining"
"illumination of the prophet"
"strong, heroic warrior"
"born of divine glory"
"dear Muhammad, praised soul"
"firm, strong, steadfast"
"generous king, he with good pastures"
Similar sound: These names share phonetic patterns with Arash — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Persian/Avestan origins, giving them the same cultural heritage as Arash.
Rhythm: Arash is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.