Here are all the middle names used for Delphi, Delphia, Delphine and Delphina found on the 1911 England and Wales census and cross-referenced with the CRB.
Delphi
Delphi Beatrice
Delphi Ellen
Delphi Kate
Delphi Kezia
Delphie Laura
Delphi Maria
Delphie May
Delphia Edith
Delphia Ellen
Delphia Jane
Delphia Laura
Delphia Maria
Delphia Maud
Delphia Olive Grace
Delphia Rose
Delphine Adela Emily Louise
Delphine Adelaide
Delphine Adele
Delphine Alice
Delphine Ann
Delphine Anna Gloria
Delphine Annie
Delphine Bessie
Delphine Caroline
Delphine Clemence
Delphine Clementina
Delphine Clothilde
Delphine Eleanor
Delphine Elise
Delphine Elizabeth
Delphine Ellen
Delphine Elsie
Delphine Emily
Delphine Emma
Delphine Emma Alice
Delphine Ernesta
Delphine Florence
Delphine Frances
Delphine Georgina
Delphine Gladys
Delphine Gwennie
Delphine Hannah
Delphine Helene
Delphine Henrietta
Delphine Irma
Delphine Isabella
Delphine Isabelle
Delphine Jane
Delphine Joan
Delphine Josephine
Delphine Julia
Delphine Justine
Delphine Kate
Delphine Leonie
Delphine Lilian
Delphine Louisa
Delphine Louise
Delphine Mabel
Delphine Margaret
Delphine Maria
Delphine Maud
Delphine Mary
Delphine May
Delphine Merida
Delphine Nellie
Delphine Olive
Delphine Rose
Delphine Susannah
Delphine Thirza
Delphine Valentine
Delphine Wilhelmina
Delphine Winifred
Delphina
Delphina Alice
Delfina Angela
Delfina Angelica
Delphina Augusta
Delfina Domenica
Delphina Dorothy
Delphina Cesarina
Delfina Charlotta
Delphina Christina
Delphina Edith
Delphina Elizabeth
Delphina Francesca
Delphina Gertrude
Delphina Harriett
Delfina Ida
Delphina Jane
Delphina Lilian
Delfina Louisa
Delfina Margherita
Delphina Marie
Delphina Mary
Delphina Maud
Delphina May
Delphina Merita
Delfina Metilde
Delphina Rebecca
Delfina Rosa Letitia
Delphina Susanna
Delfina Teresa
Delphina Ursula
Delphina Wilhelmina
Delphinie Amelia
