Cassandra "Cassie" Sandsmark, a.k.a. Wonder Girl, is a fictional character, a DC Comics superheroine. Created by John Byrne, and first appearing in Wonder Woman (vol. 2) #105 (January 1996), she is the half-human daughter of Zeus.
The Duke of Deception is a fictional character, a DC Comics villain that battled Wonder Woman in the Golden Age and Bronze Age.