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."
While sons and daughters are directly descended from parents and grandparents, "collateral" relationships indicate connections where there is no direct line of descent between the individuals. This includes aunts, uncles, nieces and nephews. The term "great" indicates that there is an additional generational difference among the relatives in question. Therefore, a "nephew" is the son of a sister or brother. "Great-nephew" indicates that the next generation -- the child of a niece or nephew -- is being identified.Learn More
The child of a niece or nephew is called a grandniece or grandnephew, depending on the child's gender. That makes the aunt a grandaunt and the uncle a granduncle.Full Answer >
A person's niece's son would be called a grandnephew, and the person would be a great aunt or uncle. In general, as new generations are added, aunts, uncles and grandparents keep their titles and just add on a "great" for each new generation.Full Answer >
One's grandmother's brother is usually called a great-uncle, in terms of familial relationships. Grand-uncle is another name for this kin, but the term isn't used as often.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 >