Milenia sits next to 5 phonetic neighbors — Milena, Melania, and Millenia are the closest matches by sound. Most share Milenia's Slavic cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gracious, dear"
"of the Livius family; belonging to Livia"
"water goddess"
"near the water/river"
"valley grace"
"jazz music woman"
"creative Cuban construction"
"beloved/wished-for child"
"word, speech"
"of the eternal city"
"determined protector"
"grace, favor of God"
"night, dark beauty via Leila connection"
"creative blend name"
"life"
"God is my strength"
"guest, stranger (from Greek Zeus/Xenos)"
Similar sound: These names share phonetic patterns with Milenia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Slavic origins, giving them the same cultural heritage as Milenia.
Rhythm: Milenia is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.