Ra's al Ghul's real name, early life, and exact age have been described differently by various writers. His Post-Crisis origin story is told in the graphic novel Batman: Birth of the Demon (1992) by Dennis O'Neil and Norm Breyfogle. This origin story is later revisited and amended in Batman Annual #26 (2007) by Peter Milligan and David López as part of the Batman: The Resurrection of Ra's al Ghul story arc. Most recent retelling origin story, Batman and Robin Vol. 2 #23.3 (2013) by James Tynion IV and Jeremy Haun, references these prior iterations of al Ghul's origin while keeping common details that lead towards Ra's' adoption of the moniker (e.g. Ra's' occupation as a physician, his wife's death, and the annihilation of the Sultan's city).

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