Pillai, meaning Prince, is a title of nobility which can either refer to a ruling chief, members of the nobility, or junior princes of the royal family historically ranked immediately below the king. The oldest lineages of Pillais include not only Kshatriyas but also brahmins who took up the sword. From the early modern period, the title also came to be bestowed upon Savarna subjects by the Kings for services military or political, most of whom were of Nair origin.

The Ettuveetil Pillamar were Nair nobles from eight ruling Houses in erstwhile Travancore in present-day Kerala state, South India. They were associated with the Padmanabhaswamy temple in Thiruvananthapuram and the Ettara Yogam. Their power and wealth grew until Marthanda Varma (1706–1758), the last king of Venad and the first king of Travancore, defeated them in the 1730s.