 Elsewhere, however, William's appeals were met with hostility and mistrust, due to the Achaean ruler's claims of suzerainty over all the Latin princes of southern Greece.From the summer of 1256, Guy I de la Roche, the "Great Lord" (""Megaskyr"") of Athens and Thebes, and his kinsman William de la Roche, had joined the Venetian camp, although they were both vassals to the Villehardouins (Guy as Lord of Argos and Nauplia and his brother as baron of Veligosti and Damala)