Etymology The word originated from the words , meaning 'mountain', and , meaning 'region' or '-ship' (as in "township"); thus translates directly as 'the mountain region'. The term Malabar was used as an alternative term for Malayalam in foreign trade circles to denote the southwestern coast of the Indian peninsula, which also means The land of hills. The term originally referred to the western hilly land of the Chera dynasty (later Zamorins and the Kingdom of Cochin), Kingdom of Ezhimala (later Kolathunadu), and Ay kingdom (later Travancore), and only later became the name of its language. The language Malayalam was alternatively called , , , , , , , and until the early 19th century CE. The earliest extant literary works in the regional language of present-day Kerala probably date back to as early as the 12th century. At that time the language was differentiated by the name Kerala Bhasha. The distinctive 'Malayalam' named identity of this language appears to have come into existence only around the 16th century, when it was known as "Malayayma" or "Malayanma"; the words were also used to refer to the script and the region. According to Duarte Barbosa, a Portuguese visitor who visited Kerala in the early 16th century CE, the people in the southwestern Malabar coast of India from Kumbla in north to Kanyakumari in south had a unique language, which was called "Maliama" by them. Prior to this period, the people of Kerala usually referred to their language as 'Tamil', and both terms overlapped into the colonial period. History Due to the geographical isolation of the Malabar Coast from the rest of the Indian peninsula due to the presence of the Western Ghats mountain ranges which lie parallel to the coast, the dialect of Old Tamil spoken in Kerala was different from that spoken in Tamil Nadu. The mainstream view holds that Malayalam began to grow as a distinct literary language from the western coastal dialect of Medieval Tamil (Karintamil) and the linguistic separation completed sometime between the 9th and 13th centuries. The renowned poets of Classical Tamil such as Paranar (1st century CE), Ilango Adigal (2nd–3rd century CE), and Kulasekhara Alvar (9th century CE) were Keralites. The Sangam works can be considered as the ancient predecessor of Malayalam. Some scholars however believe that both Tamil and Malayalam developed during the prehistoric period from a common ancestor, 'Proto-Tamil-Malayalam', and that the notion