Astreya sits next to 4 phonetic neighbors — Astraea, Astrid, and Estrella are the closest matches by sound. Most share Astreya's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"star maiden, starry one"
"new star, new sky"
"I believe"
"Midwinter feast, Christmas season"
"from the Eure river region"
"tawny orange heraldic color"
"meadow clearing"
"God is my oath (from Lisa/Elizabeth)"
Similar sound: These names share phonetic patterns with Astreya — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Astreya.
Rhythm: Astreya is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.