Cassi is a distinctive girls' name in United States, ranking #5942 in 2002 with 19 recorded births. The name reached its all-time peak in 1999 with 54 births ranking #2615. Since 1996, the popularity has decreased by 47.2%. In 2002, approximately 1 in every 94,569 girls born was named Cassi. FALLING Recent data shows the name is currently falling.