The Pompeii family of Verona began its ascent in the late Middle Ages. The founder of the family was Pompeo Pompei, who lived in Verona when the city was ruled by Antonio della Scala. In 1410 the Pompeii family became part of the noble Council of Verona. Pompey's nephew, Giovanni, obtained the privilege of immunity from the Republic of Venice in 1474 and his possessions were recognized to him at Illasi.
The Pompeii family had indeed already made its mark in the Verona administration, so much so that one of its members in 1438 had been appointed commander of the defenses of the city of Verona. Fighting on behalf of Venice, in 1509 Girolamo Pompei succeeded in capturing the Marquis of Mantua Francesco II Gonzaga, who had betrayed the Venetian Republic by passing from the Lega di Cambrai led by Pope Julius II. For this reason, Girolamo obtained the title of Count of Illasi, for years the fief of the Pompeii. Among the other awards obtained by the Pompeii there was that of becoming honorary citizens of Milan, a title conferred on them by the emperor Charles V of Hapsburg.
With the fall of Napoleon, the Emperor of Austria Francis I gave the Pompeii the title of counts of the Empire. The Pompeii family died out in 1851, maintaining the branches of the Counts Sagramoso Perez-Pompei and the Marquis Carlotti.