Kellen is a name commonly used for boys and occasionally for girls. It has Irish origins and is derived from the Gaelic name Ceallach, which means "slender" or "brave." The name has gained popularity in various cultures and regions, often associated with qualities like strength and resilience. In modern times, Kellen can also refer to various places, such as Kellen, a small village in Germany. Additionally, it is a surname for some notable individuals, including Kellen Winslow, a former professional American football player. The name continues to be a popular choice for parents naming their children.