Cassi is a distinctive girls' name in United States, ranking #5453 in 2003 with 22 recorded births. The name reached its all-time peak in 1999 with 54 births ranking #2615. Since 1996, the popularity has decreased by 38.9%. In 2003, approximately 1 in every 83,048 girls born was named Cassi. FALLING Recent data shows the name is currently falling.