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"
"father figure, patriarch"
"prince, chieftain"
"the king"
"poet, bard"
"birth, creation"
"strength, vigor"
"of noble renown"
"who is like God"
"chief, lord"
"rock, harmony"
"beloved companion"
"descendant of Otto"
"one who catches fish"
"belonging to Mars, the war god"
"modern invented name"
"maiden, heart"
"Gomeric's mountain, power mountain"
"village of the cross, farm by the cross"
"colt keeper, young horse handler"
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.