Maddox sits next to 3 phonetic neighbors — Mattox, Paddock, and Braddock are the closest matches by sound. Most share Maddox's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of Madoc"
"one who bails, deliverer"
"greatest, largest"
"follower of Christ; anointed one"
"hedge dweller, from the enclosure"
"supplanter's son (via James → Jacob)"
"place of elms"
"one who is celebrated"
"sea"
"little saint"
"brave as a wild boar"
"ever ruler, eternal king"
"venerable, sacred"
"From the Aramaic 'Toma', meaning twin; borne by the Apostle Thomas"
"son of Cole"
"God has healed"
"bright fame"
"bane, destruction (war god)"
"son of Jack"
"son of Andrew (manly)"
"born of fire"
Similar sound: These names share phonetic patterns with Maddox — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Welsh origins, giving them the same cultural heritage as Maddox.
Rhythm: Maddox is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.