Caio is a distinctive boys' name in England & Wales, ranking #873 in 2025 with 36 recorded births. The name reached its all-time peak in 2022 with 43 births ranking #758. Since 1996, the popularity has increased by 620.0%. In 2025, approximately 1 in every 7,554 boys born was named Caio. STABLE Recent data shows the name is currently stable.