Arlyn sits next to 3 phonetic neighbors — Arlen, Marlin, and Darlin are the closest matches by sound. Most share Arlyn's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"eagle, nobleman"
"mountain village; reason of the mountains (Japanese interpretation)"
"modern invented name"
"the West, where the sun sets"
"of noble birth"
"victory of the people (through Nicholas derivation)"
"one who gives victory"
"blessed, holy"
"son of little fire"
"supplanter"
"light, splendor, radiance"
"noble friend, old friend"
"one who gives light"
"valley, dell, low-lying area"
"Athenian, of Attic culture"
"of Mars, warlike"
"God is gracious (from Sean element)"
"from Airelle (place in Normandy, France)"
"bright town"
"modern coined name; possibly related to Jacob (supplanter) or Jakari"
Similar sound: These names share phonetic patterns with Arlyn — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Germanic origins, giving them the same cultural heritage as Arlyn.
Rhythm: Arlyn is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.