Kao is a distinctive boys' name in United States, ranking #7209 in 1998 with 8 recorded births. The name reached its all-time peak in 1996 with 10 births ranking #5772. Since 1996, the popularity has decreased by 20.0%. In 1998, approximately 1 in every 238,915 boys born was named Kao. RISING Recent data shows the name is currently rising.