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
Marvel Family in 1953 and DC's revival in 1972, DC Comics is today unable to promote and market their Captain Marvel/Marvel Family properties under those names. Since 1972, DC has instead used the trademark "Shazam!" for their comic book titles with the Marvel Family characters, and the name under which they market and promote the characters. When referring to the Marvel Family on comic book covers or various merchandise, they are by this legal necessity called the "Shazam Family". In 2012, DC officially changed Captain Marvel's name to "Shazam", making "Shazam Family" the name of the superhero's associate. In current continuity, the