High tower or woman from Magdala
Madylynn is a modern creative spelling of Madelyn, which ultimately derives from Magdalene. It refers to Mary Magdalene from the New Testament, with the name originally signifying a person from the town of Magdala.
Less common today
Madylynn isn't in the latest US Top 1000. It last peaked at #12,025 in 2011.
US births per 5-year period, 1990βpresent (SSA data).