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"
"Isle of Skye, Scotland"
"high, exalted"
"from Lucania"
"rival, eager to emulate"
"from Brock's town, badger settlement"
"well-spoken, good word"
"one who catches fish"
"eternal, hidden"
"little red-haired one"
"of love"
"generous, tolerant"
"sea, ocean"
"yew tree army"
"variant of Javion (possibly from Xavier — savior)"
"ripe, free"
"rich, powerful ruler"
"capable with a spear"
"brave people, bold folk"
"powerful, energetic"
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.