Zenon sits next to 4 phonetic neighbors — Zeno, Leon, and Simon are the closest matches by sound. Most share Zenon's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of Zeus, belonging to Zeus"
"defender of men"
"noble protector"
"rocky hill town"
"Short form of Uilliam, the Irish form of William"
"courageous heart"
"king, lord"
"supplanter"
"Yahweh is God"
"God is gracious"
"black, dark-featured"
"Greek man"
"lotus flower, love"
"greatest conqueror"
"son of Henne (Henry)"
"pledge or oath"
"sickle (curved blade) — describing the bird's form"
"dear friend"
"settlement by the woodland grove"
"valley"
Similar sound: These names share phonetic patterns with Zenon — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Zenon.
Rhythm: Zenon is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.