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"
"wealthy"
"from Brittany; land of the Britons"
"citadel, fortress"
"ship, navigation"
"sea, ocean"
"pearl"
"noble, exalted"
"one who binds with beauty"
"moon, moonlight"
"bright, luminous, radiant"
"stern, strict, severe"
"steadfastness, reliability"
"well-loved"
"holy, sacred (possible folk etymology connection)"
"asked of God"
"princess (variant of Sarah)"
"womanly strength"
"graceful, beautiful"
"precious stone"
"courageous, valiant"
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.