Arley sits next to 3 phonetic neighbors — Harley, Arlie, and Marley are the closest matches by sound. Most share Arley's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"hare meadow"
"pointed hill, peaked summit"
"eternal"
"calm, tranquility"
"narrow strait, slender (via Kyle)"
"from Laurentum; laurel-crowned"
"son of marsh dwellers"
"hunter"
"emperor, ruler (inspired by Kaiser/Caesar)"
"son of the spear-ruler (Gerald = Geirald)"
"God is gracious"
"ruler's counsel, powerful advisor"
"lapis lazuli, beauty"
"dweller in the woods"
"short form of Lavon or Yvon"
"servant of Marduk"
"handsome"
"thankful"
"rough waters, hard stream"
"bright color, vitality"
"chief, brave man"
Similar sound: These names share phonetic patterns with Arley — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Arley.
Rhythm: Arley is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.