Cy is a distinctive boys' name in United States, ranking #2783 in 2021 with 45 recorded births. This places Cy in the top 20% 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. In 2021, approximately 1 in every 38,850 boys born was named Cy. FALLING Recent data shows the name is currently falling.