Nancy sits next to 4 phonetic neighbors — Nanci, Nancie, and Angie are the closest matches by sound. Most share Nancy's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"favor, blessedness"
"the burning ones, highest angels"
"mountain region"
"child of light"
"moon, moonlike"
"counsel, decision"
"white phantom, fair spirit"
"nobility, aristocracy"
"of noble kind"
"diamond in the sky, place of rest"
"rowan tree (mountain ash)"
"agreement, concord, fitting together"
"dark settlement, coal village"
"pearl"
"my God is the Lord (via Hebrew Elijah)"
"mighty in battle"
"beloved and gracious"
"clear, evident"
"firstborn daughter"
Similar sound: These names share phonetic patterns with Nancy — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Nancy.
Rhythm: Nancy is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.