Arlin sits next to 5 phonetic neighbors — Arlen, Harlan, and Marlin are the closest matches by sound. Most share Arlin's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pledge, oath"
"valley settlement"
"wise one (from Sionann mythology)"
"dark one's son (from Old Norse kol, coal)"
"from Rome, Roman pilgrim"
"settlement on the ridge, hilltop estate"
"Yahweh remembers"
"Majestic, inspiring reverence"
"variant of Jason (healer) or Jacob (supplanter)"
"settlement on a Roman road, farm on the paved way"
"lover of the earth"
"son"
"of the people (from Germanic Deutsch)"
"dark one"
"of the moon, lunar"
"named after the Parisii Gallic tribe"
"battle-ready, martial spirit"
"departure, going out"
"crow crossing"
"bright, lively (Jay element)"
"God supports"
Similar sound: These names share phonetic patterns with Arlin — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic origins, giving them the same cultural heritage as Arlin.
Rhythm: Arlin is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.