Hartley sits next to 4 phonetic neighbors — Harley, Hadley, and Barclay are the closest matches by sound. Most share Hartley's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"stag meadow"
"beloved, cherished"
"unique beauty (possible Zulu-influenced)"
"the blue princess (fictional)"
"white, beautiful"
"powerful; in a state of bliss"
"symbol of enduring affection and daily remembrance"
"from Magdala, tower"
"gladness, delight"
"blue jay bird plus meadow"
"the one who holds up the heavens"
"strife, discord"
"narrow path, lane"
"jade, precious green stone"
"at the ash tree (from Nash + lee/ley)"
"immortal, eternal"
"boundary gate"
"bright, shining one"
"immortal, divine ruler"
"watchful, alert"
Similar sound: These names share phonetic patterns with Hartley — 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 Hartley.
Rhythm: Hartley is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.