Cassi is a distinctive girls' name in United States, ranking #8532 in 2009 with 14 recorded births. The name reached its all-time peak in 1999 with 54 births ranking #2615. Since 1996, the popularity has decreased by 61.1%. In 2009, approximately 1 in every 131,205 girls born was named Cassi. FALLING Recent data shows the name is currently falling.