Cai is a moderately popular boys' name in England & Wales, ranking #369 in 1997 with 62 recorded births. The name reached its all-time peak in 2006 with 192 births ranking #214. Since 1996, the popularity has increased by 34.8%. In 1997, approximately 1 in every 5,072 boys born was named Cai. RISING Recent data shows the name is currently rising.