Vader sits next to 4 phonetic neighbors — Brader, Rider, and Raider are the closest matches by sound. Most share Vader's Dutch-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"father"
"western land, western meadow"
"flowering, flourishing"
"a legend, a tale"
"wanderer"
"Inspired by Santos/Saint (Latin sanctus, holy) with a creative mode..."
"thatcher, roofer"
"oarsman; one who rows"
"root, foundation"
"steward, estate manager"
Similar sound: These names share phonetic patterns with Vader — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Dutch/Germanic origins, giving them the same cultural heritage as Vader.
Rhythm: Vader is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.