Harmonie sits next to 4 phonetic neighbors — Harmony, Hermione, and Armoni are the closest matches by sound. Most share Harmonie's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"harmony, concord, agreement"
"warlike, brave"
"eternally beautiful, ever-living"
"prayer, one who asks"
"Beautiful"
"sea of bitterness plus grace"
"beauty, strength, luxury"
"maiden, daughter"
"longed for; wished for"
"always blooming"
"strength, power"
"divine wonder, blessing"
"dark-feathered bird, the raven"
"merry, joyful"
"little Goth, from the Germanic tribe"
"God is gracious"
"little child, darling"
"English place name surname"
"safe harbor, refuge"
"bright + spring"
Similar sound: These names share phonetic patterns with Harmonie — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Harmonie.
Rhythm: Harmonie is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.