Maddilyn is a distinctive girls' name in United States, ranking #3228 in 2009 with 52 recorded births. The name reached its all-time peak in 2016 with 101 births ranking #1981. Since 1996, the popularity has increased by 766.7%. In 2009, approximately 1 in every 35,324 girls born was named Maddilyn. FALLING Recent data shows the name is currently falling.