Harley sits next to 4 phonetic neighbors — Harlow, Charlie, and Marley are the closest matches by sound. Most share Harley's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"long meadow, rocky meadow"
"bright, full of sunshine"
"voice of God"
"Yahweh has shown favor"
"pure (short for Catherine)"
"work and power combined"
"dark settlement"
"bent river or stream"
"God will add, God will increase"
"ewe herder"
"meditation, absorption"
"small, junior"
"land, territory"
"dark-complexioned son"
"charcoal, dark"
"watchful"
"brave, bold"
"defender of men"
"new, young"
"pilgrim, palm branch bearer"
"descendant of Otto"
Similar sound: These names share phonetic patterns with Harley — 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 Harley.
Rhythm: Harley is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.