Kien is a distinctive boys' name in United States, ranking #7755 in 2006 with 10 recorded births. This places Kien in the bottom 45% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2024 with 26 births ranking #4131. In 2006, approximately 1 in every 205,512 boys born was named Kien. STABLE Recent data shows the name is currently stable.