Della, main character in "The Gift of the Magi" (1906) by O. Henry
Della Duck, twin sister of Donald Duck; mother to his nephews Huey, Dewey and Louie
Della Street, secretary character in the PerryMason series
Della Frye, character in movie "State of Play"
Della Michaelson, character in "The Orchardist" by Amanda Coplin
Della Alexander, character on British soap "EastEnders"
Della, Italian preposition