Cai is a distinctive boys' name in England & Wales, ranking #512 in 2016 with 79 recorded births. The name reached its all-time peak in 2006 with 192 births ranking #214. Since 1996, the popularity has increased by 71.7%. In 2016, approximately 1 in every 4,202 boys born was named Cai. RISING Recent data shows the name is currently rising.