Caio is a distinctive boys' name in United States, ranking #5070 in 2003 with 15 recorded births. The name reached its all-time peak in 2023 with 40 births ranking #3063. Since 1996, the popularity has increased by 114.3%. In 2003, approximately 1 in every 131,685 boys born was named Caio. FALLING Recent data shows the name is currently falling.