Adel sits next to 4 phonetic neighbors — Adele, Adela, and Adelle are the closest matches by sound. Most share Adel's Arabic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"noble, noble one"
"My God is Yahweh"
"noble"
"blind, sixth (via Cecilia)"
"water, spring"
"morning dew"
"migration, flight (Islamic interpretation)"
"dear friend, intimate companion"
"harmony, familiarity, peaceful bond"
"slender, fair"
"God has acted, divine miracle"
"friend"
"prayer, worship"
"divine favor, God's pleasure"
"light is mine"
"feminine form of Aaron"
"light, radiance, brilliance"
"oak tree, my oak"
"gathering, festival"
"exalted, elevated"
"His gift; place of peace; tranquil (Biblical place name)"
Similar sound: These names share phonetic patterns with Adel — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Adel.
Rhythm: Adel is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.