The word “Malayalam” originally means mountainous country. The region which is present day Kerala was under the rule of the Tamil dynasty of kings called the Cheras. Hence, probably the name as Malay means mountain in Tamil. The ethnicity of the modern Malayali comes from a variety of races and hence cannot be categorized under any one head.
It is generally believed that between 2500 B.C. and 1500 B.C. a race, called the Dravidians had migrated from the Mediterranean region and started to inhabit India. They soon crossed the Vindhya Mountain range in search of fertile lands where their agriculture would prosper. These Dravidians spoke Tamil. But around 1000 B.C. some of the fair skinned, tall Aryans who had already migrated and settled in Northern India from the Mesopotamian region started moving down South. Some settled amicably, intermingled with the Dravidian elite (namely royalty) and were honored due to their superior intellect. Others waged wars and invaded the territory to establish themselves.
Thus started the caste system, with the Aryans declaring themselves “Brahmins”, a superior class due to their high education and superior intellectual capabilities. They vehemently discouraged intermingling in the sense, their marriages were carefully arranged and caste based. However, in the later times, with the raise of the Nair caste, the Namboodiri (Bramin) men made it a practice to marry Nair women. Very often these women belonged to the Taravads or matriarchal lineage based families. These women were allowed to marry many men from their own or a higher caste. Polygyny was also commonly practiced. All these led to an ethnological admixture of the two races.
Thus the ethnic distinctions became finer and finer. Today Kerala is a heterogeneous, multi ethnic group. Most are of Dravidian descent but the Brahmins still take pride in their Aryan ancestry. So much so, that they introduce themselves in all religious rituals as “Mama Arya Putra” (Me, the son of the Aryans). As of the current day scenario, the fair skin and long hair of Malayali women may be more due to their food habits and natural habitat rather than racial descent.