Cy is a distinctive boys' name in United States, ranking #1461 in 2006 with 105 recorded births. The name reached its all-time peak in 2010 with 117 births ranking #1416. Since 1996, the popularity has increased by 128.3%. In 2006, approximately 1 in every 19,573 boys born was named Cy. FALLING Recent data shows the name is currently falling.