Nia sits next to 4 phonetic neighbors — Mia, Tia, and Lia are the closest matches by sound. Most share Nia's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"brightness, lustrous"
"free man, free person"
"gold"
"meadow clearing (constructed modern name)"
"maiden, young woman"
"victory of the people"
"mouth of the River Roe"
"glowing ember meadow"
"middle of the plain"
"torch, radiant"
"noble clearing"
"noble, of noble birth"
"ambergris, waxy substance"
"one who mills grain"
"son of the fair warrior"
"beautiful"
"Elijah's son (surname origin)"
"defender of men (from Alexandra)"
"clean, unsullied"
"journey, life's path, travel"
Similar sound: These names share phonetic patterns with Nia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Welsh origins, giving them the same cultural heritage as Nia.
Rhythm: Nia is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.