Etta Candy is a fictional character appearing in DC Comics publications and related media, commonly as the best friend of the superhero Wonder Woman.
 A spirited, vivacious young woman with a devil-may-care attitude, Etta first appeared in "Sensation Comics" #2 (1942), written by Wonder Woman's creator William Moulton Marston.
The Duke of Deception is a fictional character appearing in DC Comics publications and related media.
 A major adversary of Wonder Woman, the Duke is a demigod of deceit, originally presented as an operative of Wonder Woman's nemesis Mars/Ares.
 He first appeared in the summer of 1942 in "Wonder Woman" #1, volume 1, written by Wonder Woman creator William Moulton Marston as an embodiment of the abnormal emotion of deception.
 The Duke popped up in "Wonder Woman", "Comic Cavalcade" and "Sensation Comics" stories throughout the 1940s and 1950s.
 But by the 1960s, when the Silver Age of Comics was in full-swing, he had all but vanished from Wonder Woman's adventures, save for a single appearance in 1964 in "Wonder Woman" #148, volume 1.
 Things would pick up for the Duke a bit in the 1970s; he received a Bronze Age facelift in 1975 in "Wonder Woman" #217, volume 1, written by Elliot S. Maggin, followed by yet another reformulation in 1977 in "Wonder Woman" #239-240, written by Gerry Conway.
 The Duke made his final Bronze Age appearance in 1979 in "Wonder Woman" #254, volume 1.
 After DC Comics rebooted its continuity in 1985 (in a publication event known as the Crisis on Infinite Earths), Wonder Woman, her supporting characters and many of her foes, were re-imagined and reintroduced.
 The Duke of Deception, though initially absent in this revised mythos, would ultimately make a handful of cameo appearances, both within DC's continuity (such as "Wonder Woman" Annual #1, volume 3), and out of it (such as "Scooby-Doo Team-Up" #5, in which Wonder Woman works with Scooby-Doo and his friends).
Wonder Woman is a fictional superhero appearing in American comic books published by DC Comics.
 The character is a founding member of the Justice League, goddess, and Ambassador-at-Large of the Amazonian people.
 The character first appeared in "All Star Comics" #8 in October 1941 and first cover-dated on "Sensation Comics" #1, January 1942.
 In her homeland, the island nation of Themyscira, her official title is "Princess Diana of Themyscira, Daughter of Hippolyta".
 When blending into the society of "Man's World", she adopts her civilian identity "Diana Prince".
 The character is also referred to by such epithets as the "Amazing Amazon", the "Spirit of Truth", "Themyscira's Champion", and the "Goddess of Love and War".
General Steven Rockwell Trevor is a fictional character appearing in American comic books published by DC Comics, commonly in association with the superhero Wonder Woman.
 The character was created by William Moulton Marston and first appeared in "All Star Comics" #8 (Dec. 1941).
 Steve Trevor is a trusted friend, love interest and partner who introduces Diana (Wonder Woman) to "Man's World", and has served as Wonder Woman's United Nations liaison.
"All Star Comics" #8 is the 8th issue of the comic series "All Star Comics" (published by All-American Publications), cover dated December 1941.
 Although the main story featured the Justice Society of America in "Two New Members Win Their Spurs", featuring Doctor Mid-Nite and Starman joining in an incident involving an evil scientist's insanity serum, it is more well known for having the first appearance of Wonder Woman in a back-up story.
Diana Prince is a fictional character appearing regularly in stories published by DC Comics, as the secret identity of the Amazonian superhero Wonder Woman, who bought the credentials and identity from a United States Army nurse, named Diana Prince, who went to South America and married her fiancé to become Diana White.
 The character debuted in "Sensation Comics" #1 (January 1942) and was created by Charles Moulton and H. G. Peter.
Sensation Comics is the title of an American comic book series published by DC Comics that ran for 109 issues between 1942 and 1952.
 For most of its run, the lead feature was Wonder Woman, a character which had been introduced in "All Star Comics" #8 (December 1941).
 Other characters that appeared included the Black Pirate, the Gay Ghost, Mister Terrific, Wildcat, Sargon the Sorcerer, Hal Mason, the Whip, the Atom, Little Boy Blue, Hop Harrigan, Romance, Inc., Lady Danger, Doctor Pat, and Astra.
The Invisible Plane (sometimes referred to as the Invisible Jetplane, Invisible Jet, and Robot Plane) is the fictional DC Comics superheroine Wonder Woman's venerable, though now seldom-used, mode of transport.
 Created by William Moulton Marston as an allegory of the feminine compliance that women of the Depression era relied on to survive in the male-dominated work place, it first appeared in "Sensation Comics" #1 (Jan. 1942).
William Moulton Marston (May 9, 1893 – May 2, 1947), also known by the pen name Charles Moulton ( ), was an American psychologist, inventor, self-help author, and comic book writer who created the character Wonder Woman.
 Two women, his wife Elizabeth Holloway Marston and partner Olive Byrne, both greatly influenced Wonder Woman's creation.
This article is about the history of the fictional DC Comics' character Wonder Woman, who was introduced in "All Star Comics" #8 (December 1941), then appearing in "Sensation Comics" #1 (January 1942), Six months later appeared in her own comic book series (Summer 1942).
 Since her debut, five regular series of "Wonder Woman" have been published, the last launched in June 2016 as part of the DC Rebirth.

Question: Who created the character that first appeared in "All Star Comics" #8 in October 1941 and first cover-dated on "Sensation Comics" #1, January 1942?
Answer: William Moulton Marston