Mar Yaqob Abuna was one of the legendary metropolitan of the Church of Malabar of st Thomas Christians.In 1503, Mar Elias, the Catholicos Patriarch of the Church of the East consecrated three Bishops from the Monastery of Saint Eugene: Rabban David as Mar Yaballaha, Rabban George as Mar Denha, Rabban Masud as Mar Yaqob. The Patriarch sent these three new Bishops together with Mar Thomas to the lands of the Indians, and to the islands of the seas, which are within Dabag, and to Sin and Masin- Java, China and Maha china- Great China.