Darrell sits next to 5 phonetic neighbors — Darryl, Darren, and Harold are the closest matches by sound. Most share Darrell's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from Airelle (a place in Normandy, France)"
"growth, abundance, increase"
"defender of the army"
"forest"
"estate dweller"
"invented elaboration of Kameron"
"safe harbor, place of refuge"
"alder tree"
"sculptor, craftsman"
"outer wall of a castle (bailey)"
"possibly lord, master (via Greek kyrios)"
"bright, radiant"
"bold, daring (thunder-bold)"
"Chinese unicorn, bringer of good fortune"
"light, happiness (Ko in Japanese)"
"divine power"
"payment, redemption (word association)"
"modern coined name, variant of Kyson"
"who is like God?"
"adventurous traveler, bold adventurer"
"father of peace"
Similar sound: These names share phonetic patterns with Darrell — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Norman French origins, giving them the same cultural heritage as Darrell.
Rhythm: Darrell is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.