Cassy is a distinctive girls' name in United States, ranking #5301 in 2005 with 24 recorded births. The name reached its all-time peak in 1998 with 50 births ranking #2700. Since 1996, the popularity has decreased by 41.5%. In 2005, approximately 1 in every 76,987 girls born was named Cassy. FALLING Recent data shows the name is currently falling.