Cass is a distinctive girls' name in United States, ranking #16227 in 2003 with 5 recorded births. This places Cass in the bottom 12% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2003 with 5 births ranking #16227. In 2003, approximately 1 in every 365,410 girls born was named Cass. STABLE Recent data shows the name is currently stable.