Nio sits next to 4 phonetic neighbors — Neo, Nico, and Rio are the closest matches by sound. Most share Nio's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"benevolent king"
"Rope maker or keeper"
"who is like God?"
"beloved, desired"
"king; the beautiful one (from Armenian legend)"
"of noble birth"
"glorious gift"
"God is salvation (derived from Yoel/Joel)"
"date palm, palm tree"
"father of many nations"
"faithful, trustworthy"
"spiritual power, authority, prestige"
"soldier"
"of the woods, forest dweller"
"mountain village; reason of the mountains (Japanese interpretation)"
"celestial body, light in the darkness"
Similar sound: These names share phonetic patterns with Nio — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Nio.
Rhythm: Nio is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.