Cai is a distinctive girls' name in United States, ranking #12491 in 2010 with 8 recorded births. The name reached its all-time peak in 2020 with 38 births ranking #3788. Since 1996, the popularity has increased by 33.3%. In 2010, approximately 1 in every 222,166 girls born was named Cai. FALLING Recent data shows the name is currently falling.