He should not be confused with the Giovanni Bozzuto whose father was Lisolo and who was a captain under King Ladislaus and a counsellor to Queen Joan II.
In 1394, he accompanied Ladislaus, Charles's son, to Rome when he was seeking Pope Boniface IX's assistance against Louis II of Anjou.
By then he held the lordship of Fratta Piccola and as such probably took part in the battle that took place between Ladislaus and Louis's forces at nearby Aversa in September 1394.
[1] A charter of Joan II dated to 1415 records that, for losses his lands in and around Bari suffered during the war against the Angevins, Giovanni was compensated with a wheat export licence for the duration of his life and that of his son Nicola.
[1] According to the Diurnali of the Duke of Monteleone, in March 1420 (or 1421) Joan II sent Giovanni and two others, Francesco Orsini and Antonello Poderico, on a diplomatic mission to request the help of King Alfonso V of Aragon against Louis III of Anjou.