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"
"God is gracious"
"mythical griffin creature"
"son of Carr, from the marsh"
"sky"
"cooked rice, meal"
"son of the third, third-born's son"
"concluding musical passage"
"son of William"
"salmon, descendant of the salmon"
"marrow of the sea, sea fortress"
"the shining one"
"stoneworker, craftsman"
"older, senior in wisdom"
"God has given"
"strength and help of God (combined from Ezra and Azariah)"
"firebrand meadow, sword clearing"
"phonetic rendering of initials J and C"
"son of the grey-haired one"
"celestial body"
"powerful leader"
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.