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"
"pure"
"God is my oath"
"up to the threshold"
"bird-like, like a bird in flight"
"mythical bird of rebirth and immortality"
"bird"
"great brightness, exceptional intelligence"
"father of many (inspired by Abraham) + blessed (Welsh wyn)"
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.