Lacey sits next to 4 phonetic neighbors — Stacy, Casey, and Tracy are the closest matches by sound. Most share Lacey's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from the town of Lassy in Normandy"
"bright, shining"
"ivy plant, climbing vine"
"beautiful"
"strength, power, virtue"
"of the lily, lily-like"
"clear as ice, pure"
"pearl"
"shining torch"
"son/child of Kenneth (the handsome)"
"rose flower"
"little eagle"
"star"
"favor, blessedness"
"pure, clean"
"beautiful, rare and precious"
"scholar, learned one"
"tempest, stormy weather"
"gracious judge"
"frequenter of churches"
"exultant, glad"
Similar sound: These names share phonetic patterns with Lacey — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French/Norman origins, giving them the same cultural heritage as Lacey.
Rhythm: Lacey is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.