a person who is a grandfather
the position of grand-father
a father of your grandparent
a father
a parent of your grandparent
the position of great-uncle
My grandfather is young at heart.
父方の.
the parents of one's parents
a male relation one one's father's side, called
one's great-great-grandparents in China, the founder of a dynasty
of a father and son who have the same name, a word that is used to indicate which one of the two is the father