Cai is a moderately popular boys' name in England & Wales, ranking #460 in 2012 with 86 recorded births. The name reached its all-time peak in 2006 with 192 births ranking #214. Since 1996, the popularity has increased by 87.0%. In 2012, approximately 1 in every 4,051 boys born was named Cai. RISING Recent data shows the name is currently rising.