Milla sits next to 5 phonetic neighbors — Mila, Millie, and Bella are the closest matches by sound. Most share Milla's Slavic cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gracious, dear, beloved (Slavic root 'mil')"
"slender, narrow"
"from the west field"
"lawful, according to law"
"gentle horse"
"poetic vision of Ireland"
"dew, generosity"
"princess"
"like coral, sea-born beauty"
"shining light, bright one"
"pledged to God"
"God will add, God will increase"
"slender + grace"
"wealthy"
"mighty in battle"
"genuine, honest, pure"
"lake, waterfall"
"deep purplish-red color"
"modern variant of Riley/Kylie sound family"
"victory, conqueror"
Similar sound: These names share phonetic patterns with Milla — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Slavic origins, giving them the same cultural heritage as Milla.
Rhythm: Milla is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.