Allen is a popular surname with English origins. It means “little rock” or “harmony” and was originally a given name. The name Allen was brought to England by the Normans in the 11th century and has since become a common surname. Famous Allens include Steve Allen, Woody Allen, and Lily Allen. Today, the name is prevalent in English-speaking countries around the world, and continues to be a popular choice for parents looking for a strong and timeless name for their children.