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"
"my messenger, my angel"
"intelligent, wise"
"Wise one, a sage person"
"old river, ancient waters"
"place of the torch or fire"
"vision, ghost"
"chess castle piece"
"keeper of enclosed parkland"
"protector of humanity"
"God has remembered"
"modern invented name"
"descendant of the shouter (herald)"
"God is my justice"
"rocky hill settlement"
"peace and agreement"
"bright army, famous warrior"
"son of a nobleman (variant interpretation)"
"rock (from city of Tyre)"
"guardian of prosperity"
"from the hills"
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.