Vance sits next to 3 phonetic neighbors — Lance, Chance, and Dance are the closest matches by sound. Most share Vance's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Dweller at the marsh"
"of good birth, aristocratic"
"will, desire + helmet, protection"
"of the sorrows (religious title)"
"pure"
"from the island of Thera"
"of the stars, star-like"
"from Crete, the island"
"of noble lineage, shining"
"Bright fame; from Germanic elements hrod (fame) and possibly relate..."
"joyful, merry, carefree"
"short form of Valerie or Valentina"
"little flower"
"blind"
"life, living"
Similar sound: These names share phonetic patterns with Vance — 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 Vance.
Rhythm: Vance is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.