The House of Borromeo is an Italian noble family. They started as merchants in San Miniato around 1300 and became bankers in Milan after 1370. Vitaliano de' Vitaliani, who acquired the name of Borromeo from his uncle Giovanni, became the count of Arona in 1445. His descendants played important roles in the politics of the Duchy of Milan and as cardinals in the Catholic Reformation. In 1916, the head of the family was granted the title Prince of Angera by the King of Italy.