Delbert sits next to 4 phonetic neighbors — Albert, Herbert, and Elbert are the closest matches by sound. Most share Delbert's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bright valley"
"Son of Nils (Neil); son of the champion"
"bought land, purchased territory"
"pledge, oath, measure"
"blessed"
"man from the Adriatic"
"heart, mind (from Hugh root)"
"wealthy protector"
"grace, elegance"
"lion, my lion"
"cold well; from the cold water source"
"western settlement"
"gentle, tame"
"victory of the people (via Nicholas)"
"Fortune, riches"
"state of being free, liberty"
"chief hero"
"son of Braxton"
"God is gracious (via Shaun)"
"ruler of the army"
"twin (loose association)"
Similar sound: These names share phonetic patterns with Delbert — 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 Delbert.
Rhythm: Delbert is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.