Are Kerala Brahmins Aryans?

The Nambudiri Brahmins, also transliterated Namboothiri, are Hindu Brahmins from the Indian state of Kerala. For centuries they held a dominating influence in all matters in the region, be it religion, politics, society, economics or culture.

Nambudiri mythology associates their immigration to Kerala from the banks of Narmada, Krishna and Kaveri rivers with the legendary creation of Kerala by Parasurama, an avatar of Vishnu.

Cyriac Pullapilly has noted a theory that the Nambudiris are associated by some with the development of the caste system in Kerala,

Pullapilly refers to other theories also but of this one he says that although Brahmin influences had existed in the area since at least the 1st-century AD, there was a large influx of these people from around the 8th-century when they acted as priests, counsellors and ministers to local kings and worked as advisors. They also prpagated the Vedic religion to the locales. The namboodri Brahmins also fought against the invaders like British. The origins of Malayalam as a language is also attributed to the Nambudiri Brahamin's mixing of Sanskrit and the local Tamil language. Their dominating influence was to be found in all matters: religion, politics, society, economics and culture.

The Nambudiri Brahmin tradition which limited the extent of marriage within their own caste led to the practice of hypergamy with the Nair community.

Hence the Namboothiri’s which we see today have nair ancestory. We cant say for sure if they are Aryans 100%.