Captain Marvel (DC Comics) Comics" #21 (1941) introduced the Lieutenant Marvels: three other boys named "Billy Batson" who could also become adult superheroes. Captain Marvel, Jr., the alter-ego of disabled newsboy Freddy Freeman, debuted in "Whiz Comics" #25 (1941). Mary Marvel, alter-ego of Billy's twin sister Mary Batson, first appeared in "Captain Marvel Adventures" #18 (1942). In contrast to Captain Marvel and the Lieutenants, both Mary Marvel and Captain Marvel, Jr. remained kids in superhero form, and were given their own eponymous books in addition to appearing as the lead features in "Master Comics" and "Wow Comics", respectively. Captain Marvel, Captain Marvel Jr., and
Captain Marvel (DC Comics) Marvel Family characters from Fawcett, and returned them to publication. By 1991, DC had acquired all rights to the characters. DC has since integrated Captain Marvel and the Marvel Family into their DC Universe and has attempted to revive the property several times, with mixed success. Due to trademark conflicts over another character named "Captain Marvel" owned by Marvel Comics, DC has branded and marketed the character using the trademark Shazam! since his 1972 reintroduction. This, in turn, led many to assume that "Shazam" was the character's name. DC later officially renamed the character "Shazam" when relaunching its comic book