Clayton sits next to 5 phonetic neighbors — Layton, Peyton, and Dayton are the closest matches by sound. Most share Clayton's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"speckled, freckled"
"black gemstone"
"money box, treasury"
"son of Carr (marsh dweller)"
"growth, abundance (speculative)"
"bear strength, brave as a bear"
"bald, hairless"
"universal, whole"
"wealth, fortune, prosperity"
"son of Harry (Henry)"
"my God is Yahweh"
"land where rye grows"
"king, royalty"
"home ruler"
"strength, dominance"
"clearing of coarse grass"
"one who is learned"
"red-haired, ruddy complexion"
"fair-haired hero; white warrior"
Similar sound: These names share phonetic patterns with Clayton — similar vowel sounds, consonant clusters, or rhythm.
Rhythm: Clayton is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.