Yulian sits next to 4 phonetic neighbors — Julian, Iulian, and Yulien are the closest matches by sound. Most share Yulian's Russian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"youthful, downy-bearded"
"protector of mankind"
"connected to Damia, goddess of the harvest"
"gift"
"safe, unharmed"
"loves horses (Philip variant)"
"manly, brave"
"fruitfulness (of the land)"
"protector of people"
"joy, laughter of God"
Similar sound: These names share phonetic patterns with Yulian — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Yulian.
Rhythm: Yulian is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.