Addilyn is a distinctive girls' name in England & Wales, ranking #4867 in 2025 with 4 recorded births. This places Addilyn in the bottom 36% of ranked UK girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2018 with 15 births ranking #1887. In 2025, approximately 1 in every 63,320 girls born was named Addilyn. FALLING Recent data shows the name is currently falling.