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"
"light, splendor, radiance"
"drawn out of the water"
"of the angel, from Angelo's family"
"gentle, merciful, dear"
"brings rain; water-giver"
"Lamb; gentle and pure"
"priceless, praiseworthy"
"bright, splendid"
"crowned one"
"loveable, worthy of love"
"glorious gift"
"of the woods, forest dweller"
"high father, exalted father"
"of noble birth"
"date palm, palm tree"
"new house, new home"
"follower of the god of wine and festivity"
"God is salvation (derived from Yoel/Joel)"
"asked for, prayed for"
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.