If a boy can be a nephew, what can a girl be?
Someone’s nephew is the son of their sister or brother. 侄子; 外甥
Someone’s niece is the daughter of their sister or brother. 侄女; 外甥女
Nephew and niece
In the language of kinship, a nephew is a son of a person’s sibling, and a niece is a daughter of a person’s sibling. Conversely, that person is the aunt or uncle of their niece or nephew. The relationship of aunt/uncle to niece/nephew is an example of second-degree relatives, meaning that their coefficient of relationship is 25%.