The Barony of Estamira was not one of the original baronies into which the Principality of Achaea was divided by the Crusaders after the conquest of the Peloponnese. Instead, it was created, some time after 1230, from territory originally forming part of the princely domain. It comprised 22 knight's fiefs and was granted to Geoffrey Chauderon, probably of Champenois origin, who was also Grand Constable of the Principality. Geoffrey died in 1278, and was succeeded in the barony and as Constable by his son John Chauderon. A daughter, otherwise unknown, is also mentioned, who was sent to Constantinople in 1261 as a hostage to the Byzantine court. Apart from Estamira, John also acquired possession of Roviata and lands in Italy, some of which he exchanged in 1289 with Hugh, Count of Brienne for the fortress of Beauvoir (Pontikokastron). He is known to have had only a daughter, Bartholomée, who succeeded him in some of his domains in 1294. The fate of the barony is unclear, but it seems that at some point it reverted to the princely domain; in 1315–1316 it was held by the forces of Ferdinand of Majorca.