Mar Kuriakos Kunnacherry was born on the 11th of September, 1928 at Kaduthuruthy in Kottayam Distrect. He was Ordained priest on the 21st of December, 1955 in Rome. He received Doctorate in Civil and Canon Laws from the University of Latern in Rome and Master's degree in Politics from USA. He was nominated bishop of Kepha and appointed Co-Adjutor Bishop of Kottayam on 9th December 1967. On February 24, 1968 he received Episcopal Ordination at Sacred Heart Mount, Kottayam from His Eminence Cardinal Maximillian de Furstenberg, Priefect of the Congregation for the Orintal Churches. At the retirement of Mar Thomas Tharayil, he took charge of the Diocese of Kottayam on the 5th of May, 1974. In addition to Malayalam and English he knows Italian, Latin, French, German and Syriac. He has served the regional, national and Universal Church in various capacities. He was a member of the Eastern Churches and a member of Pontifical Council for Inter-religious Dialogue. He served as the Chairman if the Ecumenical and Inter-religious Dialogue Commission of the Catholic Bishop's Conference of India several times.
He was the Chairman of the St. Joseph's Pontifical Seminary, Alwaye and Chairman of the St. Thomas Apostolic Seminary, Vadavathoor. He was the Vice Chancellor of the Paurastiya Vidya-pitham, Vadavathoor. He has held offices in Kerala Catholic Bishop's Council and the Syro-Malabar Bishop's Conference. He was a member of permanent synod of the Syro-Malabar Archiepiscopal Church and member of Commission for Ecumenism and particular Law.
He Retired from office on Jan 14, 2006.