K. Koshy was born in the Kingdom of Travancore, to a Nazrani family, part of the Malankara Syrian Church.

[1] Koshy desired to enter his Church's ministry and studied at the Pazhaya Seminary, Kottayam.

[3] In the nineteenth century, the highest office attained by Indians within the Anglican Church was that of an archdeacon.

[6] He also translated John Bunyan's The Pilgrim's Progress (Paradesi Mokshayathra, 1845) and The Holy War (Thirupporattam), to Malayalam.

The Archbishop of Canterbury Edward White Benson conferred on Koshy, a Lambeth Doctorate, for his pre-eminent role in that.