The ancient port of Naura, which is mentioned in the Periplus of the Erythraean Sea as a port somewhere north of Muziris is identified with Kannur.[46] The kingdom of Ezhimala had jurisdiction over two Nadus - The coastal Poozhinadu and the hilly eastern Karkanadu. According to the works of Sangam literature, Poozhinadu consisted much of the coastal belt between Mangalore and Kozhikode.[47] Karkanadu consisted of Wayanad-Gudalur hilly region with parts of Kodagu (Coorg).[48] It is said that Nannan, the most renowned ruler of Ezhimala dynasty, took refuge at Wayanad hills in the 5th century CE when he was lost to Cheras, just before his execution in a battle, according to the Sangam works.[48]