Dillian is a distinctive boys' name in United States, ranking #7200 in 2010 with 11 recorded births. The name reached its all-time peak in 1997 with 37 births ranking #2272. Since 1996, the popularity has decreased by 67.6%. In 2010, approximately 1 in every 174,401 boys born was named Dillian. FALLING Recent data shows the name is currently falling.