Dilyn is a distinctive boys' name in United States, ranking #3406 in 1999 with 23 recorded births. This places Dilyn in the top 29% 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. Since 1996, the popularity has increased by 130.0%. In 1999, approximately 1 in every 83,482 boys born was named Dilyn. FALLING Recent data shows the name is currently falling.