Maddilyn is a distinctive girls' name in United States, ranking #3891 in 2007 with 41 recorded births. The name reached its all-time peak in 2016 with 101 births ranking #1981. Since 1996, the popularity has increased by 583.3%. In 2007, approximately 1 in every 46,889 girls born was named Maddilyn. FALLING Recent data shows the name is currently falling.