Cai is a moderately popular boys' name in England & Wales, ranking #272 in 2002 with 102 recorded births. The name reached its all-time peak in 2006 with 192 births ranking #214. Since 1996, the popularity has increased by 121.7%. In 2002, approximately 1 in every 2,826 boys born was named Cai. RISING Recent data shows the name is currently rising.