Madelyn Dunham (1922–2008), the American maternal grandmother of Barack Obama
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Madelyn Renee, American soprano formerly known as Madelyn Renée Monti
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Madelyn Pugh (1921–2011), television writer who worked on the I Love Lucy television series
Born in Boston, Massachusetts, soprano Madelyn Renee attended the Dana Hall School in Wellesley, Massachusetts and Cornell University and received her Bachelor's Degree from the Juilliard School in New York.
Unbeknownst to either of them at the time, Madelyn Pryor was a clone of Jean Grey, created by Mister Sinister.