Kien is a distinctive boys' name in United States, ranking #3704 in 2004 with 25 recorded births. This places Kien in the top 28% 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 150.0%. In 2004, approximately 1 in every 79,392 boys born was named Kien. STABLE Recent data shows the name is currently stable.