Cassi is a distinctive girls' name in United States, ranking #3283 in 2000 with 41 recorded births. The name reached its all-time peak in 1999 with 54 births ranking #2615. Since 1996, the popularity has increased by 13.9%. In 2000, approximately 1 in every 44,292 girls born was named Cassi. FALLING Recent data shows the name is currently falling.