Zenith sits next to 4 phonetic neighbors — Zane, Zenon, and Zineth are the closest matches by sound. Most share Zenith's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"highest point in the sky, directly overhead"
"brave ruler"
"fruitful hill"
"son of Piers (Peter)"
"nickname for Charles"
"father of multitudes"
"cloth merchant, fabric trader"
"short form of Cameron or Camden"
"people's champion"
"God has heard"
"bright friend"
"friend, darling"
"settlement of free men"
"bringer of light, luminous"
"hollow, seething pool"
"dark, black-haired"
"modern invented name"
"lordly, master (via Cyril)"
"possibly derived from Kevin (gentle birth)"
"one who possesses, nest-maker"
"of the Caspian Sea"
Similar sound: These names share phonetic patterns with Zenith — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Arabic via Spanish origins, giving them the same cultural heritage as Zenith.
Rhythm: Zenith is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.