Zeno sits next to 3 phonetic neighbors — Xeno, Reno, and Zeno are the closest matches by sound. Most share Zeno's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gift of Zeus"
"garden, orchard of God"
"God has promised"
"one who loves God"
"eighth"
"gift of God"
"divine gift"
"divinely famous, famous through God"
"who is like God?"
"concluding musical passage"
"nobleman, member of the patrician class"
"cheerful, jovial"
"praiseworthy"
"Romantically associated with the poet Lord Byron meaning noble and ..."
"protector of people"
"precious green stone"
"defender (Greek mythological meaning)"
"gift"
"manly, brave"
"with melody, melodious"
Similar sound: These names share phonetic patterns with Zeno — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Ancient Greek origins, giving them the same cultural heritage as Zeno.
Rhythm: Zeno is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.