The Vellalar are members of several endogamous castes such as the numerically strong Arunattu Vellalar, Chozhia Vellalar, Karkarthar Vellalar, Kongu Vellalar, Thuluva Vellalar and Sri Lankan Vellalar.
The Vellalar are part of several closed-caste groups, including the prominent Arunattu Vellalar, Chozhia Vellalar, Karkarthar Vellalar, Kongu Vellalar, Thuluva Vellalar, and Sri Lankan Vellalar.