Dierks sits next to 4 phonetic neighbors — Dirk, Derek, and Dex are the closest matches by sound. Most share Dierks's German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"people's ruler"
"army protector"
"ash tree farm, settlement by ash trees"
"curly-haired"
"one who delivers goods, agent"
"he who grasps the heel"
"modern coined name, possibly hillside light"
"war, strife"
"Yahweh has heard"
"son of God-peace"
"who is like God? (rhetorical — no one is)"
"appointed by God"
"meadowland, fallow land"
"heather-covered hill"
"creative American construction"
"variant of Jason (Greek: healer) or Jayden (Hebrew: God has heard)"
"modern creative construction"
"bright, radiant"
"black youth"
"chromium element"
"little king, kingly"
Similar sound: These names share phonetic patterns with Dierks — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic (Theodoric) origins, giving them the same cultural heritage as Dierks.
Rhythm: Dierks is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.