Dilyn is a distinctive boys' name in United States, ranking #6350 in 2007 with 13 recorded births. The name reached its all-time peak in 2001 with 25 births ranking #3438. Since 1996, the popularity has increased by 30.0%. In 2007, approximately 1 in every 159,633 boys born was named Dilyn. FALLING Recent data shows the name is currently falling.