According to Selva Raj, the Udayar are not "socially humbler" than the Vellalar community[2] but, together with the Pallar and Kallar, form the Marava castes, who are quite dominant in the region variously known as Ramnad and the Maravar country.[3]
In Ramnad and the nearby areas of Pudukottai, Madurai, Salem, Namakkal, Tanjore and Trichy, they and their two fellow Maravar caste groups are prominent in their cult worship of the shrine at Oriyur that commemorates John de Britto, a 17th-century PortugueseJesuitmissionary and martyr. Raj says, "A notable feature of the Britto cult is that it is centered around caste identities rather than religious affiliation", and thus members of the caste-group, irrespective of their religious affiliation regard Britto as their clan-deity.[4]
^Raj, Selva J. (2002). "Transgressing Boundaries, Transcending Turner: The Pilgrimage Tradition at the Shrine of St. John de Britto". In Raj, Selva J.; Dempsey, Corinne G. (eds.). Popular Christianity in India: Riting Between the Lines. SUNY Press. p. 86. ISBN9780791455197. Retrieved 1 May 2012.
Burkhart, Geoffrey (June 1972). "Ranges of Endogamy in a Tamil Group". Indian Anthropologist. 2 (1): 1–6. JSTOR41919203.
Burkhart, Geoffrey (January 1976). "On the absence of descent groups among some Udayars of South India". Contributions to Indian Sociology. 10 (1): 31–61. doi:10.1177/006996677601000102. S2CID143260084.