Ku is a distinctive boys' name in United States, ranking #13188 in 2015 with 5 recorded births. This places Ku in the bottom 6% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2018 with 6 births ranking #11558. In 2015, approximately 1 in every 383,252 boys born was named Ku. RISING Recent data shows the name is currently rising.