Vaughn sits next to 3 phonetic neighbors — Don, John, and Fawn are the closest matches by sound. Most share Vaughn's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"small, junior"
"wolf counsel"
"to light up, illuminate"
"from the isle"
"brave counsel"
"of manly valor, from Andre"
"maiden, heart"
"dark settlement (place name)"
"will helmet, strong protector"
"swiftness, fleetness"
"he gave, gift"
"God is with us"
"from Dayton"
"his excellence, his preeminence"
"messenger of God"
"son of the gray-haired one"
"God has remembered"
"land of oak trees"
"small songbird"
"protected by Yahweh"
Similar sound: These names share phonetic patterns with Vaughn — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Welsh origins, giving them the same cultural heritage as Vaughn.
Rhythm: Vaughn is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.