Addilyn is a distinctive girls' name in United States, ranking #14429 in 1999 with 5 recorded births. This places Addilyn in the bottom 15% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2016 with 1,040 births ranking #312. In 1999, approximately 1 in every 354,756 girls born was named Addilyn. FALLING Recent data shows the name is currently falling.