Claim: Visconti di Modrone descend from Uberto with the first generations of Uberto's offspring was in the castle of Somma Lombardo which was later devided.
Evidence: The Visconti di Modrone descend from Uberto, younger brother of Matteo Visconti, Lord of Milan between 1287 and 1322. Since the main residence of the first generations of Uberto's offspring was in the castle of Somma Lombardo, they were known by the surname of Visconti di Somma. In 1473, the castle and other family properties were divided by the two brothers Francesco and Guido Visconti di Somma.