Maddilyn is a distinctive girls' name in United States, ranking #2034 in 2015 with 97 recorded births. The name reached its all-time peak in 2016 with 101 births ranking #1981. Since 1996, the popularity has increased by 1,516.7%. In 2015, approximately 1 in every 18,398 girls born was named Maddilyn. FALLING Recent data shows the name is currently falling.