Guy II de la Roche

[1] He succeeded as a minor on the death of his father, William I,[1] at a time when the duchy of Athens had exceeded the Principality of Achaea in wealth, power, and importance.

[8] Charles II made new arrangements when he ceded his claim to suzerainty over Achaea, Athens and other Balkan territories to his younger son, Philip I of Taranto on 13 August 1294.

[11] When listing both Achaea and Athens in his letter of grant to his son, the King implicitly acknowledged that Guy was to render homage directly to Philip.

[12] Guy's maternal uncles, Constantine Doukas and Theodore Angelos invaded their western neighbour, the Despotate of Epirus in the spring of 1295.

[19] Florent died in early 1297, and an influential Achaean lord, Nicholas III of Saint Omer, convinced the widowed Isabella to propose the hand of her only daughter, Mahaut, to Guy.

[20][19] Guy gathered the Athenian and Thessalian troops and also persuaded Nicholas III of Saint Omer to join the military campaign against Epirus.

[23] Shortly after their army crossed the frontier and the advance guard approached Thessaloniki, the Byzantine empress Eirene of Montferrat sent envoys to them and persuaded them to turn back without battle.

[23] The Empress wanted to seize Epirus and Thessaly and give them to her sons, John and Theodore, but Guy refused to make an alliance with her.

He left no heirs and the De la Roche line of dukes came to an end; Athens was disputed among rival claimants until the parliament of the duchy elected Walter V of Brienne.