The Kunjali Marakkars are credited with organizing the first naval defense of the Indian coast.[115] Tuhfat Ul Mujahideen written by Zainuddin Makhdoom II (born around 1532) of Ponnani in 16th-century CE is the first-ever known book fully based on the history of Kerala, written by a Keralite.[116][117][118] It is written in Arabic and contains pieces of information about the resistance put up by the navy of Kunjali Marakkar alongside the Zamorin of Calicut from 1498 to 1583 against Portuguese attempts to colonize Malabar coast.[118][116] Thunchaththu Ezhuthachan, who is considered as the father of modern Malayalam literature, was born at Tirur (Vettathunadu) during Portuguese period.[7][60]