to you, she is your first cousin. to your father, she is his niece.
Your father's brother's son is your first cousin and your daughter's second cousin.
Nonexistent, since my father doesn't HAVE a brother.However, hypothetically speaking, my father's brother's child would be my first cousin.
Your brother's father isyour father, unless you are half-brothers. In that case, your brother's father might be your stepfather
aunt
cousin!
Cousins
Are you asking what you call your brothers daughter? Well if you are your brothers daughter is called your niece.
Your father, perhaps?
Niece
A niece
A niece
Let's see if we can unravel this. Your sister's husband's father's brother is your sister's husband's uncle. The uncle's daughter is your sister's husband's cousin. There is no relationship to your sister, unless your sister wants to call her a cousin-in-law. To break it down to its simplest terms: She is your brother-in-law's cousin and no relationship to you.