Kien is a name of Vietnamese origin, derived from the Vietnamese word "kiên" which means "strong" or "resolute". It is often given to boys in Vietnam as it is considered a masculine and powerful name. The name Kien has a rich history in Vietnamese culture, with many notable figures bearing this name. One example is Phan Chu Trinh, also known as Phan Ba Kien, who was a prominent Vietnamese revolutionary leader during the early 20th century. Despite its strong association with Vietnam, Kien has gained popularity worldwide and can be found among people of various ethnic backgrounds today.
The name Kien experienced a significant increase in popularity over the years, starting with an average of 6-7 births per year between 1982 and 2000. From 2001 onwards, there was a notable rise, peaking at 25 births in 2004. Since then, it has maintained consistent popularity with around 15-20 births per year until the most recent years where it saw another peak of 22 births in 2021 and 20 births in 2022.