Yohanan, the only son of Koshi Philippose, was born on the 20th March 1926. At a young age, he helped his father to look after the family and to manage the farming. He married Mariamma of the Eravinalloor Pazhayathuruthel Areeckal family. They live in the Valiyamannil ancestral home. They have a son named Philip and a daughter named Susamma (Salikutty). Mariamma passed away on 21st July 2010 at the age of 82. She was cremated at Mar Aphrem Orthodox church, Thottackad.