Dilyn is a distinctive boys' name in United States, ranking #7125 in 2011 with 11 recorded births. This places Dilyn in the top 50% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2001 with 25 births ranking #3438. In 2011, approximately 1 in every 172,635 boys born was named Dilyn. FALLING Recent data shows the name is currently falling.