Kieren is an uncommon yet distinctive given name of Irish origin, derived from the Irish surname 'Ó Ciaráin.' The name is believed to mean 'descendant of Ciarán,' with 'Ciarán' itself being a derivative of 'ciar' meaning 'dark, black.' Kieren has been more commonly used as a masculine given name, though it can also be used for females. Its variant spellings include Kiernan and Kieran.
The name Kieren saw a slow start with only 6 births recorded in 1990. However, it gained popularity over the years, reaching its peak in 2003 with 27 births. After 2003, the number of births fluctuated but generally remained above 10 until around 2015. Since then, there has been a decline, with only 7 births recorded in 2022 and 12 in 2023. Over the entire period from 1990 to 2023, there were a total of 487 births named Kieren.