Kao is a distinctive boys' name in United States, ranking #13025 in 2006 with 5 recorded births. The name reached its all-time peak in 1996 with 10 births ranking #5772. Since 1996, the popularity has decreased by 50.0%. In 2006, approximately 1 in every 411,024 boys born was named Kao. RISING Recent data shows the name is currently rising.