Maddilyn is a distinctive girls' name in United States, ranking #2853 in 2012 with 61 recorded births. The name reached its all-time peak in 2016 with 101 births ranking #1981. Since 1996, the popularity has increased by 916.7%. In 2012, approximately 1 in every 28,865 girls born was named Maddilyn. FALLING Recent data shows the name is currently falling.