1308 Death of Guy before he can force his claim. His cousin, Walter de Brienne, succeeds.
The House of Brienne
The despots of Epirus and Wallachia threaten invasion. Walter makes alliance with Catalan Grand Company for defence and 1310 Walter defeats his enemies, but the Catalans refuse to quit the land.
1311 The Catalans defeat Walter at the battle of Cephisus. The Frankish power falls in northern Greece; the house of Brienne still holds fiefs in Nauplia and Argos.
The Catalan Grand Company
Roger Deslau appointed duke of Athens. His dominions are extended north and west.
The House of Aragon, Duke of Athens and Neopatras
1326 On death of Roger, Manfred, son of Frederick II of Sicily, is invested with the duchy, which becomes an appanage of the house of Aragon.
1330 William, Manfred’s brother, succeeds.
1331 The son of Walter de Brienne makes unsuccessful attempt to regain duchy.