Cowan is a term that can refer to various subjects, including a surname, a place, or a concept in different contexts. One notable example is Cowan, Pennsylvania, a small community in the United States. Additionally, Cowan can refer to Cowan's theorem, a principle in mathematics and statistics. In the context of names, Cowan is a common surname of Scottish origin. It is often associated with individuals in various fields, including sports, arts, and academia. The name has historical significance and can be found in many regions, particularly in Scotland and North America.