Delwyn is a distinctive boys' name in United States, ranking #10976 in 2001 with 5 recorded births. This places Delwyn in the bottom 11% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2011 with 9 births ranking #8231. Since 1996, the popularity has decreased by 16.7%. In 2001, approximately 1 in every 388,566 boys born was named Delwyn. STABLE Recent data shows the name is currently stable.