Cai is a moderately popular boys' name in England & Wales, ranking #299 in 2009 with 142 recorded births. This places Cai in the top 5% of ranked UK boys' names for the year. Its actual usage is classified as Moderately Popular. The name reached its all-time peak in 2006 with 192 births ranking #214. Since 1996, the popularity has increased by 208.7%. In 2009, approximately 1 in every 2,381 boys born was named Cai. RISING Recent data shows the name is currently rising.