Your Grandfather.
A "father" is like a leader of a group or idea.
if your talking about priests, they are called father because they are meant to be the closest thing to jesus who is known as the father and shepherd of man.
They are your grandparents.
His father was also called James
In Hindi, a father's mother is called "dadi" (दादी).
"Father's" indicates possession by one father, while "fathers'" indicates possession by multiple fathers.
A father's younger brother is called "chhota bhai" in Hindi.
Benjamin Franklin
The plural possessive of "Father" is, "Fathers"
father
Father's
Edmund's father was called Percival Augustus Hillary.