Orlin sits next to 4 phonetic neighbors — Orion, Orlan, and Arlin are the closest matches by sound. Most share Orlin's Slavic cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"eagle, golden eagle"
"peace, world"
"diminutive form of Zachariasz (God has remembered)"
"son of the lion, lion-like"
"YHWH is God"
"protector of men"
"immortal, undying"
"lion"
"heart (alternate Russian meaning)"
Similar sound: These names share phonetic patterns with Orlin — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Slavic orel origins, giving them the same cultural heritage as Orlin.
Rhythm: Orlin is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.