Shelton sits next to 5 phonetic neighbors — Sheldon, Dalton, and Colton are the closest matches by sound. Most share Shelton's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from the ledge farm, shelf settlement"
"new house"
"volcanic black glass"
"wealthy, God's gift"
"great happiness, delight"
"jackdaw (intelligent crow-family bird)"
"one who makes wheels"
"God plants"
"from the settlement clearing"
"who is like God? (rhetorical, meaning no one)"
"To set down in writing; an account preserved in writing"
"unbranded one, free spirit"
"raider, warrior"
"wild boar hunter"
"brave man of power"
"faithful one"
"from the stone settlement"
"to wander, to travel freely"
"from the town of Dax"
"shield rim"
Similar sound: These names share phonetic patterns with Shelton — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Shelton.
Rhythm: Shelton is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.