Madlyn is a distinctive girls' name in United States, ranking #5139 in 1999 with 21 recorded births. The name reached its all-time peak in 2005 with 32 births ranking #4326. Since 1996, the popularity has increased by 40.0%. In 1999, approximately 1 in every 84,466 girls born was named Madlyn. FALLING Recent data shows the name is currently falling.