Cai is a moderately popular boys' name in England & Wales, ranking #375 in 2011 with 107 recorded births. The name reached its all-time peak in 2006 with 192 births ranking #214. Since 1996, the popularity has increased by 132.6%. In 2011, approximately 1 in every 3,232 boys born was named Cai. RISING Recent data shows the name is currently rising.