Namesakes
Notable Actors and Entertainers:
1 actor
Alla Nazimova (a.k.a. Adelaida) 1879-1945 
Other Royalty:
1 queen consort
Fabiola of Belgium (middle name Adelaida) 1960-1993 Belgium
Saints:
1 saint
Saint Maria Christina Brando (a.k.a. Adelaida) 1856-1906