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John Grayson was a circus acrobat and member of the Flying Graysons, alongside his wife Mary Grayson and son Dick Grayson. They traveled as a family with Haly's Circus until John and Mary were murdered by Tony Zucco. Their son was taken in by Batman, to become his ward and sidekick known as Robin. John Grayson was created by Bob Kane and Bill Finger, first appearing in Detective Comics #38. (1940) ||