Upon the death of his father in Otranto, Andrea Matteo, as the elder surviving son, inherited the title of Duke of Atri and Count of S. Flaviano, which made him feudal lord of much of Abruzzo. He also received the maternal fiefdoms with the title of Count of Conversano.
Following his father's passing in Otranto, Andrea Matteo, as the eldest surviving son, acquired the titles of Duke of Atri and Count of S. Flaviano, which elevated him to a position of feudal authority over a substantial area of Abruzzo. Furthermore, he received the maternal territories with the title of Count of Conversano.