well as Walter's lands in Cyprus. Unwilling to undertake the considerable burden of defending the Greek fiefs, Engelbert exchanged them with his brother Guy, who had originally received the fief of Ramerupt in France. Guy thus became the new "Lord of Argos, Nauplia and Kiveri". Guy replaced Nicholas of Foucherolles, who had served as bailli during the last decade of Walter's reign, with two members of a branch of the Medici family who had settled in Greece: Piere Tantenes ("of Athens"), also known as "Yatro" (Greek for "physician", a hellenization of "Medici") in 1357–1360 and Arardo or Averardo de Medici in 1360–1363/4. Their rule proved unpopular, however, and in 1360 the local populace rebelled—according to historian Thanos Kondylis, perhaps with the encouragement of the Foucherolles—when Averardo de Medici increased taxation on figs and raisins, and blockaded Guy's soldiers in their castles. The situation was resolved when Guy in person came and settled in the lordship—he is attested at Nauplia in December 1364, where he issued an act in favour of Jacomo, Lord of Tzoya and a son-in-law of Nicholas of Foucherolles. Guy strengthened his ties to the lordship by marrying into the local aristocracy. The identity of his wife is unclear: the early 15th-century Chronographia regum francorum records that she was the daughter of the Baron of Arcadia, probably Erard III le Maure, while the 17th-century Flemish historian Vredius records that she was a Greek named Bonne or Maria. The 19th-century historian of Frankish Greece, Karl Hopf, hypothesized that Bonne was a daughter of Nicholas of Foucherolles, but without any evidence; nevertheless, his version is commonly accepted in modern literature. Guy's reign was troubled by the threat of the Ottoman Turks, against whom, according to the Chronographia regum francorum, he proved a courageous leader. To strengthen the security of his domains, on 22 July 1362, Guy became a Venetian citizen, a development that heralded active Venetian involvement in the affairs of the area. Two years later, soon after his arrival in the Morea, he was involved in the civil war over possession of the Principality of Achaea between Philip II of Taranto and Maria of Bourbon, widow of Philip's older brother Robert, who died in September 1364 without a direct heir. Guy, along with the Despot of the Morea Manuel Kantakouzenos (), supported Maria and her son Hugh of Lusignan until 1370, when the latter sold their claims to Philip.