Kio is a distinctive boys' name in United States, ranking #13131 in 2006 with 5 recorded births. This places Kio in the bottom 7% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2022 with 12 births ranking #7052. In 2006, approximately 1 in every 411,024 boys born was named Kio. STABLE Recent data shows the name is currently stable.