However Giacomo was a son of Philip by his second wife Catherine de la Tour du Pin and his claim to be the heir of Isabella of Villehardouin was disputed .
They were both deposed by Philip I of Taranto but continued to claim the title .
Giacomo was a son of Philip I by his second wife Catherine de la Tour du Pin and his claim to be the heir of Isabella of Villehardouin was disputed .
They were both deposed by Philip I of Taranto but continued to claim the title .