Grandmother of Han-gyeol

Grandparents are the father or mother of a person's own father and/or mother. Everyone who is not a chimera has a maximum of four genetic grandparents, eight genetic great-grandparents, sixteen genetic great-great-grandparents, etc. Sometimes these numbers are lower and in the case of having only two or three grandparents sibling or half-sibling incest would be incorporated.

In cases where the parents are unwilling or unable to provide adequate care for their children, in cases of death or other words, grandparents often take on the role of primary caregivers. Even when this is not the case, grandparents often participate in the raising of children.

In traditional cultures, grandparents often had a direct and clear role in relation to the care and nurture of children.

One can also be a step-grandparent. A step-grandparent can be your parent's stepparent or your stepparent's parent.

The various words for grandparents at times may also be used to refer to any elderly person, especially the terms gramps, granny, grandfather, grandmother and even more types that most families make up themselves.

Source: Wikipedia