Declin is a distinctive boys' name in United States, ranking #7658 in 2013 with 10 recorded births. This places Declin in the bottom 46% 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 2013, approximately 1 in every 189,125 boys born was named Declin. FALLING Recent data shows the name is currently falling.