Arun sits next to 4 phonetic neighbors — Aaron, Aroon, and Arjun are the closest matches by sound. Most share Arun's Indian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"dawn, reddish glow of sunrise"
"brave warrior, full of light"
"father of many nations"
"pure, true, real"
"triumphant warrior"
"spring of water, water gift"
"sound, to ring"
"divine command, will of God"
"courageous ruler"
"powerful one, full of zeal"
"boundless, infinite, immeasurable"
"courageous hero"
"cave dweller, one who lives in the cave"
"mind, intellect, eloquence"
"infallible, never failing, not in vain"
"the eternal divine"
Similar sound: These names share phonetic patterns with Arun — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Sanskrit origins, giving them the same cultural heritage as Arun.
Rhythm: Arun is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.