Astro sits next to 3 phonetic neighbors — Castro, Cosmo, and Orion are the closest matches by sound. Most share Astro's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"star"
"vision, dream"
"At the byres, near the cattle sheds"
"doorkeeper, one who ushers"
"gift of God"
"Lukes town"
"valley settlement"
"little fire"
"creative combination name"
"path, narrow lane"
"son of Madoc, fortunate"
"border market, trading post"
"God is gracious"
"bridge homestead"
"to reap, harvest"
"Lord, have mercy (liturgical)"
"rye grain"
"from Rome (Rum/Anatolia)"
"deer meadow"
"graceful, elegant"
"emperor, ruler, kingly"
Similar sound: These names share phonetic patterns with Astro — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Astro.
Rhythm: Astro is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.