The Welf dynasty is a prominent noble family in European history, particularly known for its influence in Germany and Italy. Originating in the 9th century, the dynasty played a significant role in the politics of the Holy Roman Empire. The Welfs were often in conflict with the Hohenstaufen dynasty, leading to a power struggle that shaped medieval European politics. Throughout the centuries, the Welfs produced several notable figures, including Henry the Lion, a powerful duke in the 12th century. The family's legacy continued with the establishment of various duchies, such as Bavaria and Brunswick, and their descendants remain influential in European aristocracy today.