Madlyn is a distinctive girls' name in United States, ranking #4890 in 2003 with 26 recorded births. The name reached its all-time peak in 2005 with 32 births ranking #4326. Since 1996, the popularity has increased by 73.3%. In 2003, approximately 1 in every 70,271 girls born was named Madlyn. FALLING Recent data shows the name is currently falling.