Kien is a distinctive boys' name in United States, ranking #5568 in 2011 with 16 recorded births. This places Kien in the top 39% 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. Since 1996, the popularity has increased by 60.0%. In 2011, approximately 1 in every 118,687 boys born was named Kien. STABLE Recent data shows the name is currently stable.