The Welf family, also known as the House of Welf, is a prominent noble family in Europe with roots tracing back to the early Middle Ages. They played a significant role in the history of Germany and Italy, particularly during the Holy Roman Empire. The family is known for its alliances through marriage and its influence in various regions, including Bavaria and Saxony. The Welfs were often in conflict with the Hohenstaufen dynasty, leading to a power struggle that shaped medieval politics. Their legacy includes notable figures such as Henry the Lion, a powerful duke, and the family's continued presence in European nobility, influencing royal lineages and governance.