Madilyn is an American spelling of Madeline, the English form of Magdalene, and so means "woman of Magdala", after the village on the Sea of Galilee where Mary Magdalene came from. The i spelling has grown up alongside Madelyn and Madilynn, all of them sharing the nickname Maddie. Madilyn has been in the US top 1000 all century, from number 642 in 2000 to a peak of number 287 in 2012, and ranks number 464 in 2025.