Maddilyn is a distinctive girls' name in United States, ranking #2961 in 2010 with 58 recorded births. The name reached its all-time peak in 2016 with 101 births ranking #1981. Since 1996, the popularity has increased by 866.7%. In 2010, approximately 1 in every 30,644 girls born was named Maddilyn. FALLING Recent data shows the name is currently falling.