Mathews Mar Athanasius (Mar Thoma XIII) (25 April 1818 – 16 July 1877) was the Malankara Metropolitan of the Malankara Church from 1852 until 1865. As a reformer, he spent most of his reign attempting to reform and heal rifts within the church. However in 1865, he was deposed by the traditionalist faction of the Malankara Church and Pulikkottil Joseph Dionysius became their leader.