Kou is a distinctive boys' name in United States, ranking #5053 in 1998 with 13 recorded births. This places Kou in the top 45% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1996 with 22 births ranking #3258. Since 1996, the popularity has decreased by 40.9%. In 1998, approximately 1 in every 147,024 boys born was named Kou. FALLING Recent data shows the name is currently falling.