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"
"moon goddess, huntress"
"generous, noble"
"shining, radiant"
"relating to the olive (archaic connection)"
"place name, possibly crown or river settlement"
"miracle"
"radiance, brightness"
"ready for war, renowned warrior"
"light, luminous"
"little Sarah, dear Sarah"
"noble, precious (from Nahuatl-Spanish fusion)"
"pure, immaculate"
"river flower (Guaraní myth)"
"she who sees, vision"
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.