Harley sits next to 4 phonetic neighbors — Marley, Charley, and Carley 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
"hare's meadow, hare clearing"
"joyful"
"bright, shining"
"torch, bright one"
"she who brings happiness"
"wide island; broad river-island"
"sea battle, sea fighter"
"famous warrior"
"dark blue, naval fleet"
"God's gift"
"bright, shining one"
"son of Kenneth"
"pale, fair"
"oath of God"
"queen, ruler"
"from the bogs near the Roe river"
"cold, dark season of rest and renewal"
"home strength, brave power"
"faith"
"battle glory"
"modern coinage blending Jay and Kayla"
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.