Genetic Origins
If you are interested in genetic origins of the group, the following research evidence is useful. Ezhavas are part of the non-tribal communities in Kerala. A crypto-Dravidian origin for the nontribal communities of South India based on human leukocyte antigen class I diversity. Excerpt:
HLA diversity of the Dravidian communities is very distinct from that in the other world populations. It is obvious that the nontribal communities of Kerala display a greater Dravidian influence, but traces of genetic admixture with the Mediterranean, western European, central Asian and East Asian populations can be observed. This characterizes the crypto-Dravidian features of the nontribal communities of Kerala.