Kailen is a unisex name of Gaelic origin, meaning "slender" or "pure". It is a name that exudes strength and sophistication. People with the name Kailen are known for their charismatic personality and natural leadership abilities. They are often admired for their determination and resilience in the face of challenges. Kailen is a name that carries a sense of elegance and grace, making it a popular choice for both boys and girls.