Derly is a distinctive boys' name in United States, ranking #12956 in 2009 with 5 recorded births. This places Derly 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 1997 with 8 births ranking #6776. In 2009, approximately 1 in every 396,661 boys born was named Derly. STABLE Recent data shows the name is currently stable.