Declin is a distinctive boys' name in United States, ranking #7210 in 2017 with 11 recorded births. This places Declin in the bottom 49% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2014 with 14 births ranking #6066. In 2017, approximately 1 in every 168,211 boys born was named Declin. FALLING Recent data shows the name is currently falling.