Newton sits next to 3 phonetic neighbors — Norton, Newt, and Colton are the closest matches by sound. Most share Newton's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"new town"
"earth, sea"
"modern American invented variant of Zayd"
"dweller near ash trees"
"anointed one"
"from the skilled settlement"
"pure strength"
"shining, brilliant"
"brave in battle (via Casey etymology)"
"marshland meadow"
"to shout, cry out with joy"
"variant X-spelling of Zane"
"heard by God"
"imperial authority"
"son of Dionysus"
"my father is peace"
"priceless, of inestimable worth"
"descendant of fire, young warrior"
"from Lucania, southern Italy"
"supplanter, heel-follower (Jacob/James origin)"
Similar sound: These names share phonetic patterns with Newton — 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 Newton.
Rhythm: Newton is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.