Sanskritisation
Along with South Indian groups such as the Pandyans, who historically claim a lineage of the Pandavas according to tradition, it appears Kurukulam comes from the Kurus in Mahabharata and Kshatriya origin. The concept of Sanskritisation has been widely discredited, as phylogenetically and culturally, members of the Dravidian and Indo-Aryan groups have been mixing and similarly the lexicons and myths, since 200 BCE at the very latest.
Read more about this topic: Karaiyar