Astraia sits next to 4 phonetic neighbors — Astrea, Astra, and Estrella are the closest matches by sound. Most share Astraia's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"star maiden, goddess of justice"
"father of many (inspired by Abraham) + blessed (Welsh wyn)"
"God is my oath"
"mythical bird of rebirth and immortality"
"shining, sparkling"
"up to the threshold"
"life"
"pure"
"musical, soaring"
Similar sound: These names share phonetic patterns with Astraia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Astraia.
Rhythm: Astraia is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.