Fulton sits next to 5 phonetic neighbors — Colton, Bolton, and Dalton are the closest matches by sound. Most share Fulton's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"settlement by a bird-trap"
"son of Hays, hedged area"
"divine strength"
"great river (geographic)"
"my strength is Yahweh"
"God has given"
"to hunt, to chase"
"the frenzied one, the inspired"
"thorny shrub, wild rose"
"variant of Pruitt, meaning valiant"
"lapis lazuli, beauty"
"of the forest, wood dweller (via Silas)"
"narrow strait, slender (via Kyle)"
"rule, measuring rod"
"lion, lion of God"
"Lord, have mercy (liturgical)"
"unbranded cattle; one who refuses to conform"
"from Brock's town, badger settlement"
"enlightenment, awakening"
"armed host, military force"
"spirit, companion"
Similar sound: These names share phonetic patterns with Fulton — 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 Fulton.
Rhythm: Fulton is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.