Cai is a distinctive girls' name in United States, ranking #7744 in 2009 with 16 recorded births. The name reached its all-time peak in 2020 with 38 births ranking #3788. Since 1996, the popularity has increased by 166.7%. In 2009, approximately 1 in every 114,804 girls born was named Cai. FALLING Recent data shows the name is currently falling.