May God in His infinite compassion receive your father and all the departed into His Eternal Kingdom!
Sadly, many Christians seem to believe in a god who is a cross between a lawyer and a forensic accountant, whose aim is to exclude rather to receive, and to cast out rather than to draw in. That is not the teaching of our Lord.
He taught us that in His Father?s Kingdom there are many rooms....we cannot know who will be given a place in that Kingdom and are warned against attempting to make such judgements.
While it is heresy to say that all must be saved, it is sound Orthodox belief to hope and pray that all may, through the incomprehensible love of God, be saved.
May your father, and John?s father, and my father be amongst them.