Halley sits next to 5 phonetic neighbors — Hailey, Hayley, and Halle are the closest matches by sound. Most share Halley's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"holy (folk association)"
"fiery spark, blaze"
"flowing water, to drip or trickle"
"descendant of Aodh (fire)"
"Yahweh is merciful"
"gentle, soft"
"breath of life"
"light"
"musical, joyful"
"boar meadow, wild clearing"
"priceless, praiseworthy"
"princess (via Amira)"
"radiant, brilliant (invented meaning)"
"God is gracious"
"ray of light combined with tender Lin"
"gift of God"
"inspired by Germany (spear-land, warrior country)"
"radiant, brilliant light"
"elf counsel (from Avery root)"
"hazel tree grove or meadow"
"rose island (geographic reference to Rhodes)"
Similar sound: These names share phonetic patterns with Halley — 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 Halley.
Rhythm: Halley is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.