In 1313, he returned to Sicily to take part in the war then in hand with the Angevins and was created Lord of Catania. Margaret of Villehardouin was then in Sicily, seeking to advance her claim to the Principality of Achaea. She gave her daughter Isabella of Sabran to Ferdinand in marriage and resigned Akova and her claim on Achaea to the couple, who were married in Messina. Margaret died in March 1315 in captivity in Chlemoutsi, and her daughter on 7 May 1315 in Catania, shortly after bearing a son, James III of Majorca.
Shortly after her death, Ferdinand set out with a small company for the Morea to uphold the claim now held by his son. He seized Clarenza in June 1315 and briefly took control of the Morea. In the autumn of 1315 he took a second wife, Isabella of Ibelin, daughter of Philip of Ibelin, Seneschal of Cyprus. However, his rival claimant Matilda of Hainaut, and her husband Louis of Burgundy returned to the Morea in the spring of 1316 with Venetian aid. Ferdinand's expected aid from Majorca and Sicily was tardy, as was that of the Catalan Company from Athens. Facing superior numbers, he was killed at the Battle of Manolada, near Glarentza, on 5 July 1316. He was succeeded as heir presumptive of Majorca by his elder son, the future King James III, and as Viscount of Aumelas by his posthumous son, Ferdinand.