Milan sits next to 5 phonetic neighbors — Mila, Miley, and Nolan are the closest matches by sound. Most share Milan's Slavic cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gracious, dear, beloved"
"sweet singer"
"pleasant, sweet"
"night, dark beauty"
"strong, noble, high"
"ring of light"
"short form of Penelope"
"heavenly, of the sky"
"to warn, admonish"
"sea and sky"
"of the Tatius family"
"resolute protection, strong-willed guardian"
"God is gracious"
"beautiful friend"
"honor (from Honoria)"
"industrious, eloquent one"
"of the sun"
"hillside by the pool"
"bird + grace"
"amber spark, fire glow clearing"
"messenger"
Similar sound: These names share phonetic patterns with Milan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Slavic origins, giving them the same cultural heritage as Milan.
Rhythm: Milan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.