Your grandfather's brother is your great-uncle. In some countries, he may also be called a granduncle.Know More
Similarly, your grandfather's sister is your great-aunt or grandaunt, and you are her great-nephew (grandnephew) or great-niece (grandniece). A great-aunt or great-uncle is also your mother's or father's aunt or uncle. Great-uncles, great-aunts, great-nephews and great-nieces are part of the immediate extended family in most genealogy structures.
Your spouse's grandfather's siblings are your great-uncles-in-law or great-aunts-in-law, and you are their great-nephew-in-law or great-niece-in-law.
Of course, kinship and familial relations are often different in cultures outside the United States. Thus, it is always important to study what relationships are deemed close family and extended family for your particular heritage.Learn more about Genealogy
A person's nephew's son would be the person's grand nephew. "Grand" is added to many genealogy relationships as a way to show the addition of one more generation. For example, a person's daughter's child would be referred to as the person's grandchild.Full Answer >
A sibling's spouse, children and grandchildren will all have different relationship names. A sibling's spouse will be the person's brother-in-law or sister-in-law, and the sibling's children will be the person's nieces or nephews, depending on the gender of the child.Full Answer >
The son of a niece is called a "great-nephew." The child refers to the aunt or uncle of his mother as his "great-aunt" or "great-uncle."Full Answer >
A sister or sister-in-law of a grandmother or grandfather is commonly called a "great aunt" or, less frequently, a "grand aunt." Amy Johnson Crow of Ancestry.com argues that "grand aunt" is technically the more correct term, though it is less common.Full Answer >