Cai is a distinctive girls' name in United States, ranking #8998 in 2005 with 12 recorded births. The name reached its all-time peak in 2020 with 38 births ranking #3788. Since 1996, the popularity has increased by 100.0%. In 2005, approximately 1 in every 153,975 girls born was named Cai. FALLING Recent data shows the name is currently falling.