Dutch sits next to 2 phonetic neighbors — Hutch and Butch are the closest matches by sound. Most share Dutch's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from the Netherlands, of Dutch heritage"
"of Mars, warlike"
"Olympic victor"
"hollow, empty space"
"heart, mind, spirit (from Hugh)"
"man of the forest"
"island meadow"
"beloved of God, beloved of Yahweh"
"chamber, enclosed space"
"man of law, lawyer"
"my God is Yahweh"
"trout (from the fish's spotted pattern)"
"invented by Sir Walter Scott, based on Old English Cerdic"
"hollow, cauldron"
"son of Rhys, son of the ardent one"
"eastern town"
"eminent marrow"
"love, romantic feeling"
"lake meadow"
"son of Dick, son of Richard"
"older, senior in wisdom"
Similar sound: These names share phonetic patterns with Dutch — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have English origins, giving them the same cultural heritage as Dutch.
Rhythm: Dutch is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.