Saint Superan (in French) or San Superano (in Catalan) refers to a castle, possibly close to Landiras 19 miles south-southeast of Bordeaux.
In 1381, Mahiot, the chiefest of the three, was raised to the position of bailiff of Achaea by the Latin Emperor James of Baux, while Pedro and Berard appeared as his imperial captains.
Following the death (1383) of James, his successors, Charles III of Naples and his son Ladislaus, failed to maintain control of their principality of Achaea and the Navarrese Company held the power in the region.
On 26 July 1387, Pedro, with the backing of both the secular and ecclesiastic authority in Greece, confirmed a treaty with Venice whereby she was ceded rights in the port of Navarino.
On 6 September that year, Pope Urban VI declared that as James of Baux's successors had forfeited their rights to the Holy See, the principality belonged to him and he devolved its government on Paul Foscari, the archbishop of Patras, who in turn made Pedro vicar general.
In 1399, Pedro defeated an invasive Turkish army and received the titles of papal vicar and gonfalonier of Achaea from Boniface IX (15 February 1400).
Maria gave the regency to her nephew Centurione II, who promptly paid the outstanding sum required by Ladislaus and received investment as prince.