Rhya sits next to 5 phonetic neighbors — Rhia, Ria, and Riah are the closest matches by sound. Most share Rhya's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"flowing, from the river"
"valley of the River Kent"
"breath of life, living"
"fictional Targaryen name"
"genuine, faithful"
"feminine form of Jason/Jaylen (healer, supplanter)"
"fairy palace by the lake"
"hill, mound"
"crowned with laurels"
"pure"
"from the Alara River (Antalya, Turkey)"
"bright, radiant"
"God is gracious"
"creative modern variant of Celia/Shelia"
"little honey, sweet one"
"God is witness"
"pale or fair woodland glade"
"smooth, flowing (evoking the Nile River)"
"courageous, valiant"
"resurrection, she who will rise again"
Similar sound: These names share phonetic patterns with Rhya — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Rhya.
Rhythm: Rhya is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.