Ruslan sits next to 4 phonetic neighbors — Raslan, Aslan, and Ruslan are the closest matches by sound. Most share Ruslan's Russian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"lion"
"drawn from the water"
"myrrh, fragrant resin"
"blissful, beatified"
"diminutive form of Zachariasz (God has remembered)"
"little Hasan, very good"
"eagle-like, strong as an eagle"
"heroic mortal man"
"of the lion lineage"
"lion"
"tall, long-legged"
"YHWH is God"
"protector of men"
"ruler, king"
Similar sound: These names share phonetic patterns with Ruslan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Turkic (arslan) origins, giving them the same cultural heritage as Ruslan.
Rhythm: Ruslan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.