Maddilyn is a distinctive girls' name in United States, ranking #9121 in 2001 with 11 recorded births. The name reached its all-time peak in 2016 with 101 births ranking #1981. Since 1996, the popularity has increased by 83.3%. In 2001, approximately 1 in every 163,687 girls born was named Maddilyn. FALLING Recent data shows the name is currently falling.