Answer:
A line of rulers from a single family is commonly referred to as a "dynasty." Dynasties are a hereditary succession of rulers, typically within a specific political or cultural context. This form of governance has been prevalent throughout history in various civilizations, such as the Egyptian Pharaohs, Chinese dynasties like the Ming and Qing, and European monarchies like the Tudors in England. The passing of power within a dynasty is often based on familial lineage, with leadership descending from one generation to the next.