Arin sits next to 5 phonetic neighbors — Erin, Aaron, and Aryn are the closest matches by sound. Most share Arin's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"mountain of strength; enlightened"
"raven"
"gift of God"
"given life by Zeus"
"related to Thalia: to blossom, to flourish"
"hillside lake or flowing water (from Brae + lyn roots)"
"clearing in the hazel grove"
"hazel-tree meadow, clearing of hazel trees"
"sea, ocean"
"azalea flower"
"battle-alert"
"royal sky"
"clearing by the water"
"tailor, one who cuts cloth (from Taylor root)"
"stone of the flank (medicinal stone)"
"geographic place name used as personal name"
"light, radiance, beams of light"
"gift of God"
"honey"
"sky; clouds; atmosphere"
Similar sound: These names share phonetic patterns with Arin — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Arin.
Rhythm: Arin is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.