Caio is a distinctive boys' name in United States, ranking #9466 in 1997 with 5 recorded births. This places Caio in the bottom 12% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2023 with 40 births ranking #3063. Since 1996, the popularity has decreased by 28.6%. In 1997, approximately 1 in every 377,018 boys born was named Caio. FALLING Recent data shows the name is currently falling.