Kai is a popular boys' name in England & Wales, ranking #74 in 2023 with 693 recorded births. The name reached its all-time peak in 2010 with 1,308 births ranking #56. Since 1996, the popularity has increased by 226.9%. In 2023, approximately 1 in every 399 boys born was named Kai. STABLE Recent data shows the name is currently stable.