Cai is a distinctive boys' name in England & Wales, ranking #687 in 2025 with 52 recorded births. This places Cai in the top 11% of ranked UK boys' names for the year. Its actual usage is classified as Uncommon. The name reached its all-time peak in 2006 with 192 births ranking #214. Since 1996, the popularity has increased by 13.0%. In 2025, approximately 1 in every 5,230 boys born was named Cai. RISING Recent data shows the name is currently rising.