Harmoni sits next to 3 phonetic neighbors — Harmony, Hermione, and Armony are the closest matches by sound. Most share Harmoni's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"agreement, concord, fitting together"
"lake (suffix)"
"ruler of the land"
"sea of bitterness (etymological root)"
"little star (possible etymology)"
"white settlement"
"from the raven meadow (possible)"
"feminine form of Michael"
"divine gift"
"sky, heavens"
"blood red, vibrant red"
"little dark one, dark-complexioned"
"God's gift of grace"
"purple blossom"
"compassion, forgiveness, grace"
"pledged to God, God is my oath"
"life"
"ruler of the elves"
"world-encircling river"
"Yahweh has shown favor"
Similar sound: These names share phonetic patterns with Harmoni — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Harmoni.
Rhythm: Harmoni is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.