Darlene sits next to 4 phonetic neighbors — Darleen, Darlene, and Marlene are the closest matches by sound. Most share Darlene's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"beloved darling"
"one who farms the land"
"controlled release"
"divinely favored"
"modern invented name, phonetic blend"
"hawk-like; stately"
"shining, pale"
"weapon, mace bearer"
"farm by the fen"
"initials: various combinations (Andrew Charles, Anthony Cole, etc.)"
"undulating; like a wave"
"Dealer in cloth and fabrics, cloth merchant"
"The lord is high"
Similar sound: These names share phonetic patterns with Darlene — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English via American creation origins, giving them the same cultural heritage as Darlene.
Rhythm: Darlene is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.