Dilyn is a distinctive boys' name in United States, ranking #4886 in 2010 with 19 recorded births. The name reached its all-time peak in 2001 with 25 births ranking #3438. Since 1996, the popularity has increased by 90.0%. In 2010, approximately 1 in every 100,969 boys born was named Dilyn. FALLING Recent data shows the name is currently falling.