Yuhanon was born on 25 April 1957 to Rev.E.O.Thomas Cor-Episcopus and Thankamma in Elavinamannil family, Omallur, Pathanamthitta.

His basic theological education is from Mor Ignatius Dayro Manjinikkara.

Later he joined Serampore University as an external student and obtained Bachelor of Christian Studies (BCS) degree.

[3] On 14 September 1976, at the age of 19, Yuhanon was ordained deacon by Catholicose Mor Baselios Paulose II.

In 2000, Moran Mor Ignatius Zakka I Iwas, Prince Patriarch of Antioch and All the East appointed Fr.