Caio is a distinctive boys' name in United States, ranking #5355 in 1999 with 12 recorded births. This places Caio in the top 46% 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 increased by 71.4%. In 1999, approximately 1 in every 160,007 boys born was named Caio. FALLING Recent data shows the name is currently falling.