Astor sits next to 3 phonetic neighbors — Hector, Chester, and Nestor 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"
"junior, the younger one"
"one who lives by hawthorn bushes"
"battle, spirit of battle"
"hollow"
"of the river (if -von is from Welsh afon)"
"handsome, well-built, beautiful of form"
"bird-like, of the birds"
"faith, reliance, confidence"
"descendant of Ógán"
"healer (via Jason)"
"watchful, alert, vigilant"
"bold, narrow strait"
"creative variant of Tavian or Haven"
"from Arcy (place name)"
"manly, brave, strong (via Andre/Andreas)"
"my father is peace"
"fifth"
"skilled, expert, proficient"
"priceless, of inestimable worth"
"reddish complexion"
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.