Kariattil Mar Iousep, alternatively written as Mar Joseph Kariattil, (5 May 1742 – 10 September 1786) was the first native Indian to be appointed as Metropolitan of Kodungalloor (Cranganore) for Syrian Catholics in the territory now comprising Kerala, India. Joseph Kariattil was born at Alengad, near Aluva in present-day central Kerala. He had his initial religious education at the Seminary at Alangad. Later he was sent to the Propaganda College of Pontifical Urban University, Rome, in 1755 when he was barely 13 years old. There he was ordained as a priest, and he took doctorate in Philosophy, Theology and Canon law from there. He was the first Indian national in history to receive multiple doctoral degrees in 18th century. Before 1765 he also authored, under the pen-name of Giuseppe Chariati Indiano, a grammar of the Malayalam language in Portuguese, preserved in the Bibliotheca Nazionale in Rome. He returned to India in 1766. He was then appointed as a Malpan at Alangad Malpanate Seminary. Kariattil Malpan took great efforts for the reunion of the Saint Thomas Christians (also known as Syrian Christians or Mar Thoma Nazranis) who had split following the Coonen Cross Oath. It was only by the efforts of Rev Malpan Joseph Kariattil and prominent Nazrani laity leader Thachil Mathu Tharakan the bishop of Varapuzha apostolic vicariate bishop Francis De Sales, who pleaded to Malpan for help was able to get settled in Alangad Church in year 1776. On 18 March 1777, the bishop of puthenkoor Jacobite faction Mar Thoma VI met with Mar Joseph Kariattil to discuss about the reunification of puthenkoor with pazhayakoor and to be part of Catholic family. He made the historic journey to Rome in 1778 together with Paremmakkal Thoma Kathanar to represent the matter with the church authorities there. He met the Queen of Portugal and royal patron of padroado Maria Francesca (Maria I) and submitted an official request in August 1779. The padroado missionaries were totally against reunification of Nazranis and propaganda missionaries didn't promote either. She and authorities of Portugal were really impressed with the humility, personality, religious zeal and intellect of Kariattil Joseph Malpan and hence he was appointed as the Archbishop of Kodungalloor at Lisbon on 16 July 1782. On 17 February 1783 he was consecrated as Archbishop of Cranganore (Kodungalloor) by Emeritus Archbishop of Goa Mar Francisco De Abasouda, Bishop of Macau Mar Alexandreous and Bishop of Mayya