Harmony sits next to 3 phonetic neighbors — Hermione, Melanie, and Brittany are the closest matches by sound. Most share Harmony's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"musical concord, agreement"
"son of Cionaodh (fire-born)"
"high tower, elevated place"
"hay meadow"
"from the town of Brielle"
"the fall season; harvest time"
"light"
"devoted to Jove (Jupiter)"
"precious, dear one"
"keeper of the park or game"
"honey bee"
"feminine diminutive of Gabriel"
"descendant of Raghallach"
"woodland clearing of the wren"
"oath of God"
"resolute protector"
"high tower"
"the Frenchman, one who is free"
"noble, exalted"
"divine, heavenly"
"alluring, enchanting"
Similar sound: These names share phonetic patterns with Harmony — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek harmonia origins, giving them the same cultural heritage as Harmony.
Rhythm: Harmony is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.