Delwyn is a distinctive boys' name in United States, ranking #9876 in 2003 with 6 recorded births. This places Delwyn in the bottom 23% 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. In 2003, approximately 1 in every 329,212 boys born was named Delwyn. STABLE Recent data shows the name is currently stable.