Hayley sits next to 5 phonetic neighbors — Hailey, Haley, and Hadley are the closest matches by sound. Most share Hayley's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from the hay field"
"animal horns"
"moon"
"free man, free woman"
"beloved, wished-for child"
"joy, happiness, gladness"
"child of light"
"beloved, pure"
"white island"
"meadow clearing"
"deep blue-purple color, from India"
"divine play, cosmic sport"
"supplanter, held by the heel"
"youthful goddess, keeper of immortality"
"God has favored me"
"God is gracious"
"descendant of Rian"
"invented, sound-based name"
"flirtatious, charming"
"combination of Ember (fire) and Lynn (lake)"
Similar sound: These names share phonetic patterns with Hayley — 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 Hayley.
Rhythm: Hayley is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.