Darnell sits next to 4 phonetic neighbors — Darnell, Arnell, and Cornell are the closest matches by sound. Most share Darnell's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"hidden nook, secret alcove"
"lord, master"
"son of Roderick"
"of noble birth"
"concluding musical passage"
"from the estate of the fighter"
"village by the street"
"one who lives by rivers"
"harmony, concord"
"brave"
"powerful leader"
"sadness, melancholy"
"island meadow"
"strong; speckled one"
"rocky land, gray land"
"Great, magnificent, venerable"
"sea of bitterness, drop of the sea"
"roe deer forest, deer wood"
"broad hillside"
"invented modern name, no classical meaning"
Similar sound: These names share phonetic patterns with Darnell — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French origins, giving them the same cultural heritage as Darnell.
Rhythm: Darnell is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.