Kunnappilly, Vazhappilly, Payyappilly, Maliakkal, Pattamukku, Thaiyil etc. Of these families, Sankarapuri and Palamattam (Pakalomattom) were ordained and set apart for sacred orders and bishops. The priesthood has been practically hereditary in the two families, Sankarapuri and Palamattam, for several centuries with the inheritance in the female line While there is much doubt on the cultural background of early Christians, there is evidence that some members of the St Thomas Christian community observed Brahmin customs in the Middle Ages, such as the wearing of the Upanayana (sacred thread) and having a kudumi. The medieval historian Pius Malekandathil believes these were customs adopted and privileges won during the beginning of the Brahmin dominance of medieval Kerala. He argues that the Syrian Christians in Kerala, integrated with Persian Christian migrant merchants, in the 9th century to become a powerful trading community and were granted the privileges by the local rulers to promote revenue generation and to undermine Buddhist and Jain traders who rivaled the Brahmins for religious and political hegemony in Kerala at the time. An organized Christian presence in India dates to the arrival of East Syriac settlers and missionaries from Persia, members of what would become the Church of the East, in around the 3rd century. Saint Thomas Christians trace the further growth of their community to the arrival of Jewish-Christians (early East Syriac Christians) from the region of Mesopotamia led by Knāi Thoma (anglicized as Thomas of Cana), which is said to have occurred either in the 4th or 8th century. The subgroup of the Saint Thomas Christians known as the Knanaya or Southists trace their lineage to Thomas of Cana, while the group known as the Northists claim descent from the early Christians evangelized by Thomas the Apostle. The traditional histories of the Thomas Christians note that the immigration of the Knanites reinvigorated the church of India, which was at the moment of their arrival deprived of ecclesial leadership. The arrival of the migrants is also associated with connecting the native Church of St. Thomas with the Syriac Christian tradition of the Church of the East. During this time period Thomas of Cana received copper plates of socio-economic and religious rights for his relations, his party, and all people of his religion. The granting of these plates is noted to have enhanced the social position of all the ancient Christians of India and secured for them royal protection from