Cy is a distinctive boys' name in United States, ranking #1545 in 2008 with 104 recorded births. This places Cy in the top 11% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2010 with 117 births ranking #1416. Since 1996, the popularity has increased by 126.1%. In 2008, approximately 1 in every 19,615 boys born was named Cy. FALLING Recent data shows the name is currently falling.