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"
"rulers advisor, mighty counselor"
"grey, rocky land"
"God is gracious (via Shawn/Sean/John)"
"God has helped"
"bright, shining"
"western meadow, western clearing"
"fionn (fair) + laogh (warrior)"
"pine tree"
"male deer, strong young man"
"noble son"
"God supports"
"hollow, empty space"
"from Lucania"
"The sky, heavens"
"lawman, legal authority"
"stoneworker, craftsman"
"without death, eternal"
"from the hills"
"divinely chosen"
"highlands, uplands"
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.