Rinoa sits next to 6 phonetic neighbors — Lenora, Renoa, and Renata are the closest matches by sound. Most share Rinoa's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"dignified, cold beauty (Rin component)"
Similar sound: These names share phonetic patterns with Rinoa — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Rinoa.
Rhythm: Rinoa is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.