Cai is a distinctive boys' name in England & Wales, ranking #526 in 2017 with 74 recorded births. The name reached its all-time peak in 2006 with 192 births ranking #214. Since 1996, the popularity has increased by 60.9%. In 2017, approximately 1 in every 4,363 boys born was named Cai. RISING Recent data shows the name is currently rising.