Van sits next to 4 phonetic neighbors — Dan, Tan, and Vin are the closest matches by sound. Most share Van's Dutch-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of, from (Dutch)"
"dexterous, adept"
"son of the red-haired one"
"powerful ruler of the home"
"dealer in provisions and supplies"
"light, luminous"
"he who holds firm the good"
"the brown one"
"valley, dell"
"father figure, patriarch"
"one who helps"
"faith, pledge"
"king"
"one who catches fish"
"meadow, woodland clearing"
"son of the victor"
"laughter"
"leek farm village"
"colt keeper, young horse handler"
"king of birds (folkloric)"
"brave in battle"
Similar sound: These names share phonetic patterns with Van — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Dutch origins, giving them the same cultural heritage as Van.
Rhythm: Van is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.