What's the name of the niece's child?

1, uncle's wife should be called aunt, and aunt should call herself nephew or niece.

2, aunt, pinyin shěnshěn, also known as aunt, aunt, can also be used as uncle's wife. Uncle's wife is called aunt, and uncle's wife should be called aunt.

Modern "uncle" is a respectful name for father and brother. As the old saying goes, my father's second brother is called "uncle", my father's sister-in-law is called "aunt" and my husband's brother is called "uncle".