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Mary Marvel is the twin sister of Captain Marvel and a member of the Marvel Family, given incredible powers by the wizard Shazam. Originally Mary Batson is adopted under the name Mary Bromfield, although she later discovers Billy Batson is her long-lost brother. She has been a member of the Justice League and Super Buddies. Mary Marvel was created by Otto Binder and Marc Swayze, first appearing in Captain Marvel Adventures #18. (1942) ||