Adelaida sits next to 5 phonetic neighbors — Adelaide, Adela, and Adeline are the closest matches by sound. Most share Adelaida's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"noble kind, noble natured"
"illusion, divine power"
"miraculous, worthy of wonder"
"gentle, tender (linden tree)"
"from the tower, elevated"
"sea of bitterness plus grace"
"from Milan"
"helper, one who assists"
"tender, gentle (Arabic Lina)"
"combination of Maria + Teresa"
"honey-beautiful (mel + linda)"
"Italy, land of the Vitali (young cattle)"
"victor's crown from athletic games"
"gazelle, tender"
"fairy queen, diminutive of Tatiana"
"possessor of good, upholder of good"
"grace, favor (from Ana/Hannah)"
"my God is Yahweh"
"short form of Antonia/Antoinette"
"mistress, lady, the lady of the house"
"joyful (folk etymology via joy)"
Similar sound: These names share phonetic patterns with Adelaida — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old High German origins, giving them the same cultural heritage as Adelaida.
Rhythm: Adelaida is a 5-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.