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')"
"shrewd, clever, knowledgeable"
"from the marshes"
"each of the two, pure one"
"lawful, according to law"
"mighty in battle"
"hay clearing"
"briar meadow, clearing among the briars"
"beautiful serpent (wisdom)"
"light"
"shining light, bright one"
"wished for child"
"coral from the lake"
"bright, clear"
"torch, sun ray"
"slender + grace"
"the other Aenor"
"crooked nose"
"pearl"
"grace, favor"
"made from kermes insect dye"
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.