Mattilyn is a distinctive girls' name in United States, ranking #7543 in 1999 with 13 recorded births. This places Mattilyn in the top 45% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2012 with 40 births ranking #3887. In 1999, approximately 1 in every 136,445 girls born was named Mattilyn. STABLE Recent data shows the name is currently stable.