Astor sits next to 4 phonetic neighbors — Astoria, Aspen, and Esther are the closest matches by sound. Most share Astor's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"hawk, bird of prey"
"From Laurentum; the bay laurel tree; associated with honor and victory"
"son of the loving one"
"beloved of God"
"inspiring wonder and awe"
"young servant, attendant to nobility"
"ascent, going up"
"Inuit goddess of the sea; ruler of the deep"
"flower; to shine"
Similar sound: These names share phonetic patterns with Astor — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French origins, giving them the same cultural heritage as Astor.
Rhythm: Astor is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.