Dillyn is a distinctive boys' name in United States, ranking #4859 in 2007 with 19 recorded births. The name reached its all-time peak in 1999 with 24 births ranking #3300. Since 1996, the popularity has increased by 90.0%. In 2007, approximately 1 in every 109,223 boys born was named Dillyn. FALLING Recent data shows the name is currently falling.