Zeyn sits next to 4 phonetic neighbors — Zayn, Zain, and Zane are the closest matches by sound. Most share Zeyn's Arabic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Beauty, grace, adornment"
"wise one (from connection to sacred well)"
"sacred ritual drink"
"boar strength, hardy"
"craftsman, carpenter"
"near the barns, barn keeper"
"Anthony in Hawaiian"
"from the valley"
"clear, luminous person"
"dawn, morning"
"fire and blood (fictional Valyrian)"
"noble estate"
Similar sound: These names share phonetic patterns with Zeyn — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Arabic origins, giving them the same cultural heritage as Zeyn.
Rhythm: Zeyn is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.