Adele sits next to 3 phonetic neighbors — Adela, Adeline, and Adell are the closest matches by sound. Most share Adele's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"noble, nobility"
"son/child of Kenneth (the handsome)"
"bright, shining light"
"beautiful picture, painted beauty"
"meadow of the wren"
"the great sea, vast waters"
"one who lives near the castle outer wall"
"foreign woman, stranger"
"abundance"
"to strive, to rival, to excel"
"defender, helper of mankind"
"the other, foreign (one)"
"son of the sea, great tide"
"woman from Magdala, high tower"
"fair, pleasant companion"
"rowan tree (mountain ash)"
"pure"
"joyful, of Jupiter"
"with a web over her face"
"woman of Judea"
"driftwood"
Similar sound: These names share phonetic patterns with Adele — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Adele.
Rhythm: Adele is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.